SA05260271B1 - Apparatus and method for evaluating an underground formation - Google Patents

Abstract

TECHNIQUES FOR REDUCED CONTAMINATION FORMATION EVALUATION ARE PROVIDED. THE TECHNIQUES RELATE TO DRAWING FLUID INTO A DOWNHOLE TOOL (10) POSITIONABLE IN A WELLBORE (14) PENETRATING A SUBTERRANEAN FORMATION (F) HAVING A VIRGIN FLUID AND A CONTAMINATED FLUID THEREIN. FLUID IS DRAWN INTO AT LEAST TWO INLETS FOR RECEIVING THE FLUIDS FROM THE FORMATION (F). AT LEAST ONE EVALUATION FLOWLINE (28) IS FLUIDLY CONNECTED TO AT LEAST ONE OF THE INLETS FOR PASSAGE OF THE VIRGIN FLUID INTO THE DOWNHOLE TOOL (10). AT LEAST ONE CLEANUP FLOWLINE (30) IS FLUIDLY CONNECTED TO THE INLETS FOR PASSAGE OF THE CONTAMINATED FLUID INTO THE DOWNHOLE TOOL (10). AT LEAST ONE FLUID CIRCUIT IS FLUIDLY CONNECTED TO. THE EVALUATION FLOWLINE AND/OR CLEANUP FLOWLINES (28, 30) FOR SELECTIVELY DRAWING FLUID THEREIN. AT LEAST ONE FLUID CONNECTOR (48) IS PROVIDED FOR SELECTIVELY ESTABLISHING A FLUID CONNECTION BETWEEN THE FLOWLINES (28, 30). AT LEAST ONE SENSOR IS PROVIDED FOR MEASURING DOWNHOLE PARAMETERS IN ONE OF THE FLOWLINES (28, 30). FLUID MAY BE SELECTIVELY PUMPED THROUGH THE FLOWLINES TO REDUCE THE CONTAMINATION IN THE EVALUATION FLOWLINE (28).FIG. 3

Description

Y —_ _ Apparatus and method for evaluating the complete Cua ol subterranean formation

background of the invention

The present invention relates to methods for performing the process of evaluating an underground formation by means of a land bed equipment

A downhole tool is positioned in a wellbore that cuts through the underground formation

more specifically; The present invention relates to methods for reducing contamination of formation fluids

,. downhole tool ull Bs are checked out and/or rated by 0

Wells are drilled in order to locate and produce hydrocarbons, and ak 33 is introduced

A wellbore pit with a drill bit at its terminal end into the ground to form a wellbore.

As the drilling unit advances, drilling mud is pumped through the drilling bass and out of the bit.

Drilling to cool the drilling rig and to carry away iad chips. The fluid exits the isd bit and flows 1 back to the surface for recirculation through 52a) Drilling mud is also used in

Formation of a mudcake to line the wellbore idl.

During the drilling process, it is desirable that various assessments be performed for the formations penetrated by a hole

wellbore and in some cases the drilling rig may be equipped with test equipment and/or equipment

To take samples from the surrounding Formation 008. In some cases, the equipment may be removed 1 _ excavation; And JS drilling rig extends wireline cable to the wellbore for formation testing

ground formation and/or sampling from it. In some cases, sak may use digging to perform

DSM _ Testing and sampling processes. These samples or tests may be used to locate valuable hydrocarbons. The process of evaluating the ground formation usually requires withdrawing the fluid from the formation to a downhole tool for the purpose of testing and/or obtaining samples. There are various devices such as clad o ¢ and these are extended from the downhole tool to make fluid contact on the Jamal formation with the wellbore al hole and to withdraw the fluid to the downhole tool all. A typical probe is an annular element that extends from the wellbore unit and is positioned on the side wall of the wellbore. There is a rubber pad located at the terminal end of the probe; These are used to make a tight connection with the side wall of the ill wellbore 0 . Another method is used to make a tight connection on the side wall of the wellbore; This method is known as bilateral filling. In this filling, two rubber rings extend diagonally or radially around the stomach to isolate part of the wellbore between them. The rings make tight contact with the wellbore wall sill; It also allows the fluid to be drawn to the secluded part of the wellbore wall and to the inlet port located in the Basle bottomhole tool yl. The mudcake lining of the wellbore hole is used to assist the probe and/or the dual packers in making a tight connection with the Jaa hole of all the wellbore wall. Once a tight connection is made, the fluid is drawn from the formation into the downhole tool idl through the inlet hole; This is done by means of aia 0 pressure located in the downhole tool. There are examples of sensors and/or

_ Fillings used in ill bottom equipment and these are described in the following US patents: EAT.OAY 44 and 1477171 5 Eo Bmtaa and Lahfkf Ta and Lakala and EE A AAR AAR TE A BPR A RR LAY) © Adee typically performs formation assessments on fluids drawn into a downhole tool. Wa has technical methods to perform various measurements and/or to collect samples from the internal fluid into the downhole tool Jill. However, it was found that when the formation fluid passes into the downhole tool, there are various contaminants (Je) wellbore fluids ll and/or drilling mud; These may enter Baad with formation fluids. These pollutants may affect the quality of the measurements and/or samples taken from the formation fluids. In addition, contamination may lead to picking delays in performing wellbore jil operations; In this case, additional time is required to conduct further tests and/or obtain samples. In addition, prior to these problems may result in incorrect results that are erroneous and/or cannot be used. So; It is desirable that the formation fluids 1008000 _ entering the bottom of the blisters be sufficiently "clean" and "virgin"; and be valid for testing. In other words, the earth formation must contain few or no pollutants. Attempts were made to prevent contaminants from entering the bottom of the blisters with a formation fluid of 0. For example, as described in US Patent No

Q —_— _ 14 Filters were placed in the collectors to prevent the entry of pollutants into the downhole tool with the formation fluid. In addition to that; Wy stated US Patent No. 1701484 of the inventor “Hrametz” provides the grout probe with a ring to divert contaminated fluids away from the clean fluid 0018 entering the probe. Despite the availability of technical methods to assess the formation of the earth and to deal with the phenomenon of pollution; However, there is a need to adapt the flow of fluids through the downhole tool ill (aia) to prevent contamination when the fluid enters and/or passes through the downhole tool ill. It is desirable that these techniques have the ability to divert contaminants away from the clean fluid. It is also desirable that these methods have the ability to divert contaminants away from the clean fluid. It is also desirable that such methods have the ability to perform one or more of the following tasks, among others: - analysis of Hla fluid through flowlines; - Selective manipulation of fluid flow through a downhole tool; - respond to detected contamination; Vo - remove contamination and/or provide some flexibility in handling fluids in shale downhole tool .

at _— _ a general description of the invention in at least one aspect the invention relates to a formation evaluation system with a low degree of contamination for use in a downhole tool Li _ being positioned in a wellbore yu penetrating an underground formation It has virgin fluid and contaminated fluid 0 contaminated fluid and the system is provided with the following: - at least two entry ports for receiving fluids of configuration ba - at least one flowline for assessment that is fluidly connected with at least one of the two ports of entry; This is for the virgin fluid to pass to the bottom of the blister. - at least one of the flushing flowlines is fluidly connected to at least 1 of the inlet ports; This is for the contaminated fluid to pass through to a downhole tool ull - at least one fluid circuit connected fluidly to the evaluation and/or cleaning flowlines; This is to selectively withdraw the Led fluid; - at least one device for fluid delivery and for making selective fluid connection between \o evaluation and/or cleaning flowlines; - At least one sensor to measure bed blister parameters in flowlines Esna10_ for evaluation and/or cleaning.

VY — _ In the AT aspect the invention relates to an equipment for evaluating a low-polluted land formation; These can be positioned in a wellbore ill so that they penetrate an underground formation containing virgin fluid and a contaminated fluid. (832% Lay) shall be provided with the following: - A device for fluid communication extending from a housing to the interlock with a wellbore; It has at least two entry ports for receiving fluids from the formation; - at least one of the evaluation flowlines is positioned in the housing and is fluidically connected to at least one of the inlet ports for the passage of virgin fluid to the downhole tool dl « - at least one of the flowlines for flushing is fluidically connected to the ye ports of entry for passage of the contaminated fluid to the bottom of the blister - at least one fluid circu is fluidically connected to the evaluation and/or cleaning flowline; This is to withdraw the fluid in it selectively. - At least one instrument for fluid delivery and for making selective fluid contact between the evaluation and/or cleaning flowlines and lea - At least one sensor for measuring bottoming variables a0 in the flowlines for evaluation and/or cleaning. In another aspect, the invention relates to a method for evaluating an underground formation containing virgin fluid and a contaminated fluid. The method includes Mu'atha Qa'bather

m - lg downhole tool at least two entry ports that prepare for the withdrawal of fluids at least one evaluation line and at least one cleaning line in the downhole tool ad). The equipment is positioned in the wellbore so that it penetrates the formation; fluid is drawn selectively into flowlines for evaluation and/or cleaning; A fluid connection is made selectively between the 5 rating and/or cleaning flow lines; Downhole parameters are measured in the fluids in the 05 appraisal and/or clean-up flowlines. Finally, in another pocket of invention; It also relates to a method for drawing the fluid into a downhole tool a and positioning it in a wellbore that penetrates an underground formation 0 and has virgin fluid and a contaminated fluid . The method includes positioning a fluidic contact device so that it interlocks on the Jaa wellbore wall; Make a fluid connection between at least one of the evaluation flowlines in the fluid communication device and the ground formation; make a fluid connection between at least one of the flushing flowlines in the fluidic contact device and the ground formation ¢ and pump the fluid into the flushing flowline at a cleaning pumping rate; and pump the fluid to the rating flowline at the rating pump rate; LEI cleaning and/or evaluation infusion rates are adjusted at separate intervals; The formation fluid is then evaluated in the flowline of the evaluation and/or cleanup after the interval.

BRIEF EXPLANATION OF DRAWINGS To understand in detail the features and advantages of the invention (Jad) the specific description of the invention which was briefly referred to above may be referred to models illustrated in the accompanying figures and drawings. It is noted, however, that the attached figures and drawings only show typical examples in this invention; © and therefore shall not be considered limiting or restrictive to the scope of 1 of the invention which may apply equally to

Other effective models. Figure 1: Schematic view of a partial cross-section of an equipment for assessing blister bed formation; These are described in wellbore yu in juxtaposition with a subterranean formation; Figure ?: It is a schematic view of part of the earth formation assessment equipment at the bottom of the borehole in Figure

1 01 Shown here is a fluid flow system 420 to receive fluid 42 from the adjacent configuration Fig. ©: a detailed schematic view of a downhole tool id) and the fluid flow system A fluid Fig. ¢Y Fig. A: statement For a graph showing fluid flow rates through ol 53 bottom of ll downhole tool 8 Fig. 1 using asynchronous pumping;

1 Figures (b-1): schematic views of the fluid flow through the shel bottom of the blisters in the form of ? At A Ll - © respectively in de form fo form : is a graph showing the fluid flow rates through the downhole tool 8 Fig. ? using asynchronous pumping.

- Ve =

Figures (*b-1b-;): are schematic views of the fluid flow through the saa downhole tool in the form of ? at points e/- 1 respectively in do form

Figure 1a: A graph showing fluid flow rates through a downhole tool 4 Figure Y using partially synchronized pumping;

0 Figures Emel VT) are schematic views of fluid flow through a bottomless equipment.

downhole tool fd) in the form * at points -A © respectively in the form +a;

Figure 7a: A graph showing fluid flow rates through an oll downhole tool in the form of ¥ using simultaneous pumping in the vertical dimension;

Figures (Lab-1 Lap-E): Schematic views of the fluid flow through a bottom stomach

dy - respectively in the form BE -A in the form - ? At points 000018 tool dl 0 ill through a fluid bottom-hole tool Figure *a: It is a graph showing the fluid flow rates; sample chamber Figure A also shows the flow into the “downhole tool” through the equipment Bottom fluid (Hab-e): are schematic views of the fluid flow (VA) Figures JA, respectively, in the form of E-A Figure? At points 4 downhole tool ull Detailed description: 0 The preferred embodiments in this invention are illustrated in the figures and drawings described above and which will be described in detail below. When describing preferred models, similar or identical reference numbers are used to identify common or similar items. Figures do not have to be 144Y

11 - - Illustrated with drawing scales; Rather, some features and projections of shapes may appear at enlarged drawing scales or in schematic form; This is for the purpose of clarity and accuracy. Figure 1 of Blak illustrates the use of a say downhole tool in the present invention. Any downhole equipment capable of performing the formation assessment process, such as a drill rig, coiled pipe, or other such equipment, may be used here. Jil equipment represented by 80k wellbore cable (V+) conventional wireline tool (gals) that is extended from the drilling equipment (VY) to the wellbore oad (04) via JS drilling ( V1) wireline cable near the ground formation -(F) formation and supplies Blak (V+) downhole tool with a (YA) probe in preparation for sealing with the wellbore wall and for withdrawing fluid From ground formation 0 to blak downhole tool Dual packers are also shown here (71) to illustrate different devices for fluid communication »such as probes and/or shims; these are used to withdraw fluid To Bae the bottom of the downhole tool Jill The backup pistons (V9) help push the Bal downhole tool idl and the cock towards the wall of the wellbore wall 0 It displays a Y figure Schematic view of part of the downhole tool Lill in Fig. —1; Lalla shows fluid flow 0. (4) fluid. It is preferable that the (YA) probe extend from Bix downhole tool to entangle with wellbore wall Jul. The probe shall be provided with a filling (01) for sealing with The wall of the wellbore wall; this filling is in contact with the wall and forms a tight contact with the mudcake lining (77) of the wellbore pit 0. The mud dough seeps into the wall of the wellbore hole Lan, wellbore wall about it

ALA - Sweep Zone (V4) around Hole Sill 6 . The sweep area contains mud and other fluids in wellbore fd ; These contaminate the surrounding ground formations including Formation (F) and a portion of the clean formation fluid (77) contained therein. Preferably, the (YA) probe should be equipped with at least two 5+ flowlines, namely the 0 evaluation flowline “A”) and the cleaning flowline (r+) and in cases In which dual packers 38 are used, providing entry ports between them for fluid withdrawal to the 10185 flow lines for evaluation and cleaning in the Bax downhole tool. dual packers used to draw fluid into separate flow lines; these ela are described in 0 published US Patent Application No. 00 Eon ETF assigned to the present owners; and also in US Patent No. 6761464 assigned to Halliburton The evaluation flowline extends to the downhole tool and is used to pass adil formation fluid to the downhole tool to perform testing and/or sampling operations and the flowline extends For evaluation to the (Ve) sample chamber to collect formation fluid samples 1 for ground formation fluid and the flowline for cleaning (Fr) extends to Basle downhole tool It is used to withdraw the contaminated fluid ue contaminated fluid from the clean fluid flowing to the flowline of the rating 0 and the contaminated fluid may be canceled in the wellbore all through the exit port (YY) exit port and may use one or more pumps (5)

Tread to pull the fluid through the flowlines, and it is preferable that there be a barrier between the flowlines of evaluation and cleaning in order to separate the fluids that flow into them. Referring now to the YO figure, the VE fluid system (Fig. 1) is shown here in more detail. In this form, the fluid is drawn into the flowlines of evaluation and cleaning”; © through the (VA) probe. As the fluid flows into the stomach, the contaminated fluid is released into the VE (Fig. Y) so that the clean fluid (77) can enter the evaluation flowline. (FUSE) (YA) The contaminated fluid is drawn into the cleaning line away from the evaluation flowline as shown away from the evaluation flowline as shown by the arrows. Figure 0 ¥ shows the probe probe containing a cleanout flowline forming a loop around the surface of the probe. However, be aware that other designs can be used for one or more absorption and flowlines running through the probe. The evaluation and cleanout flowlines ( T+ YA) from the (VA) probe and through the fluid outflow system (4") located in the downhole tool. 1 The flowlines for evaluation and apoptosis are in the SUE fluidic connection. With flowlines extending through the fluid flow system as will be described in this text.The fluid flow system in the form of © has various features to adapt the flow of clean and/or contaminated fluid as it passes From an anterior site near the formation to a posterior site through a downhole tool. The system is provided with a set of measuring and/or fluid adjustment devices. Such as flow lines (YO 77 (FY (FY) Fe (YA (YA) flowlines and pumps.

16 — - 5 ; pistons (£4) and sample chambers (7); valves (4); and “¢A) fluid connectors (5¢)0 FA (sensors £7) The system may also be equipped with a range of additional devices such as Cad, transducers and processing devices; and other devices for flow adjustment and/or performing various formation assessment operations. The YA flowline extends from the VA probe and connects fluidly with the flowlines extending through the downhole tool. Connect the pela flowline to the rating (YA) with an initial test press (160), Jie sensors (iva) pressure gauge and a fluid analyzer (0 {£1) fluid analyzer. The flushing flowline 0 (V0) from the (VA) probe is fluidly connected to the flowlines extending from the Bis crescent to the bottomhole tool ull . Preferably, the “0_ cleaning flow line Adna” (71) is equipped with a first test plunger (fr), Jha sensors (VA) pressure gauge and fluid analyzer (£7) and may be connected to The dae Jie sensors (z VA) pressure gauge with Yo (YA) flowlines 0 for evaluation and cleaning to measure the existing variables Je gis differential pressure. There may be A sensors Other locations along any of the flowlines constituting the lead of the fluid flow, upon request.One or more pretest presses may be provided to draw the fluid into the equipment and to perform the pretest process. Typical to generate a small amount of 0 pressure for downdraft; with build-up pressure in the flowline when the fluid is drawn

and 1 - to the downhole tool through probe 0 and when used in conjunction with a probe that has a flowline for evaluation and cleaning it (Say) placed the initial test piston along each of the flowlines so as to generate formation curves These curves can be compared and analyzed.In addition, the initial test presses can be used to draw the fluid to 33 0 and fracturing the slurry along the wellbore wall. The pistons 8 may be rotated simultaneously or at varying rates to regulate and/or create differential pressures across the corresponding flowlines. Initial test presses may also be used to diagnose and/or detect operational problems. When the pistons rotate 5 at different rates, the isolation integral between 0 lines can be determined here. When a change in pressure appears in flowline 8, this may indicate insufficient isolation between the flowlines, and this may in turn indicate insufficient tightness between those lines. Pressure readings via elf flowlines may be used by rotating the pistons ¢ to help diagnose any problems or verify that the operation is performing adequately. eo The fluid flow system may be equipped with fluid communication tools such as crossover (45) and/a junction (10©), to cross the fluid between the 10:5 flow lines. appraisal and cleaning (and/or fluidly connected flowlines). These devices may be shown in different fluids along the fluid flow system; This is to divert flow from one or more flowlines to the desired components or devices in 5a bottom

It is pimples downhole tool. As shown in the form? A swivel threader may be used to make a fluid connection between the rating flowline ("A") with the flowline (7)- and the flushing flowline (V+) with the flowline (79).In another expression, the fluid can be selectively diverted from the flow step between a different flow step at a desire of 0 Sy oo, for example, the fluid can be diverted from the flow line (YA) flowline to a circuit (wer) flow circuit (ax) The fluid can also be converted from the flowline (+¥) to an 8 (fo+) flow circuit containing the junction (0) shown in Figure - ¥ on a group of valves (det) valves B C; D) with accompanying junction flow lines (¢OY) 54) Valve 0 (£4 {) allows the fluid to pass from the flow line (Y4) flowline to the flowline connector (4 *) 5] or through the flowline (71) to the flow circuit (fo) and the Valve allows (4b) The fluid passes from the (*Y) flowline to the (Yo) flowline up to the flow circuit (+0) and Valve (4b) allows the passage of The fluid and its flow between the flowlines (Yq) flowlines (before the (tf d2¢) valves, and the Valve (38€) allows the fluid to flow between the (Yo “¥Y) flowlines After the Jet ( valves ) Jie This configuration allows selective mixing of the fluid between the 5 flow lines of the rating and cleaning; It is a formation (Say used - for example - to pass the fluid from the flowlines to all or any of the special circuits for obtaining samples (do b).

17 - - z Valves de 6 (valves 4 b) may also be used as valves to isolate fluid 010 in the (FY “Y4) flowlines from the fluid remaining in the fluid flow system located after the valves valves (4 a b). Isolation valves are closed in order to isolate a fixed volume of fluid in the Banks bottomhole tool idl (i.e. in the flowlines located between the formation ° ground formation and between the valves + a b). The fixed volume located in front of the Valve (44a) and/or (tg) is used to perform bottoming measurements such as pressure and movement.

In some cases he may wish to separate the evaluation lines from the cleaning lines during sampling, for example. This may be achieved by closing the valves (44c) and/or (352) to prevent the passage of fluid between the YY flowlines (YY ¢Y4) flowlines 35). In other cases he may desire a fluid connection between the flowlines to perform Jia pil bottom measurements, formation pressure measurements and/or motion estimation. This may be achieved, for example, by closing the valves (££) and opening the valves (4;c) and/or (282) to allow the fluid to flow through the flowlines (FY (YQ) flowlines or ( Yo FY) respectively. As the fluid passes into the flowlines, here pressure meters located along the flowlines ve can be used to measure the pressure and to determine the change in volume and flow area at the inter-socket interface

probe and the formation wall. This information may be used to generate traffic formation. Lind valves (££ c) may be used to allow fluid passage between flowlines within the Blak downhole tool; This is to prevent the pressure difference between the flowlines. In the absence of this valve, the differential pressures between the flowlines 0 may cause here the passage of fluid 428 from the flowlines al through the formation

- A

formation and its return to another flowline in the “downhole too!”

Which changes the wrong measurements of pressure and movement.

The junction (©) may also be used Jad is part of the fluid flow system after it

For a part of the fluid flow system before it. For example, when the valves are closed

Jet ) 0 b) The (°V) junction may be used to pass the fluid from a position located before the junction

to other parts in the Bled downhole tool, i.e. Sie through the (tt) Valve and

flowline (75); Hence fluid flow circuits can be avoided. In another example, when

closing the valves (44a b) and opening the valve (d), this configuration may be used to allow

By the passage of the fluid between (on) fluid circuits and/or to other parts of the 0 equipment - downhole tool through Valve (4; k) and flowline ( 71). may be used

This formation is also used to allow the fluid to pass between other parts and circuits for fluid flow.

without fluid contact on the probe. This may be useful in cases where components are present

Additional components after the connection such as additional sensors and/or fluid circuit modules

The Lind connection (01) may be operated with the valves (4a and ;d) closed and the valves (EE) Yo and 388) open. In this configuration the fluid (Sey) fluid resulting from both

The two flow lines are to cross from a position before the link (0) to the (Yo) flowline, and as an alternative

about it; The valves can be closed (4 each and 4 d) and the valves open (4 or

(zt) so that the fluid produced by both flow lines passes from a position before the joint (01) to

flowline (1?).

- ye b) (sometimes referred to as sample or fluid circuits) have 0 for) and preferably flow circuits contain (44 ;); flow lines accompanying the intake of valves (1); and a sample chamber (7;) and valves, and one or more of them may be used here. downhole tool through the bottom of the blister equipment fluid Flow circuits For the purposes of description two different flow circuits are shown; But you may use similar flow circuits or different combinations of them.‎ 0 . (io +) flow circuit from link (0) to the flow circuit (YY) flowline and the flow line may extend to the fluid circuit (4; e) to selectively allow the passage of the fluid Valve and the valve is provided beyond the (TY) flowline of the fluid and the fluid may be diverted (fo+) flow circuit through iad and into a hole (1 - 77) flowline (5;e) up to the (fo+) flow circuit Flow Valve The valve from the fluid flow line Alternatively the fluid 0 (Io) exit port zg all 0 (Y - 133) flowline may be diverted through the flowline (at €) Valve Beyond the valve (¥)) flowline ?) =I 1 a- v7) pumps (44f). Valve pumps may be provided up to the valve (33a-7) respectively. (©?a-) via the valve (32)-(32) flowline passing through the fluid flow line and the fluid may be diverted or to the valve (1) (#7” b- flowline (4) f) and to the drill hole by means of the flow line Valve 0 (1) and the pump oY —YY) flowline (4; g) is placed here by means of the valve (Y (7?b- flowline) In the flow line via the valve (Y —= ¥Y) flowline flowing through the fluids flowline and the fluids may pass the flowline or to the flowline (1 - TV) flowline (4; g) to the line The flow valve may cross the fluid (1) (77c- flowline) and when switching to the flowline (0a-71c).

Secret

Valve route (4; c) into the drill hole through the flowline (3*d-1); or back from it through the 0 (Y - SY) flowline and when diverted through the flowline flowline -z¥Y") The fluid 40 is collected in the 0 {£Y) sample chamber and the Lidl flowline ("*d-©") extends into the borehole and/or connects fluidly flowline

M (73*-). The pump (+77C) is placed in the flowline (7D - (Y) to withdraw the fluid.

through it.

The circuit (0) shown in the diagram contains a valve (aE) that selectively allows fluid 8 to flow from the (Ye) flowline into the flow circuit ( 0b) and fluid 8 may flow through the Valve ( 4;e) to the flowline (73c-1 ) or to the flowline

Y —z¥Y) flowline 0 ( up to the sample chamber (7;b). The fluid passing through the flowline (77c-1) may pass through a valve (521 up to the Gas flowline (**D-1) and out of the borehole or to the flowline (#3D-1). The Lead flowline (D*7) extends © ) from the sample chamber (7b)

to the borehole and/or connected fluidly to the flowline (77D-7). The pump is placed (377)

ve in the flowline (**d-© ) to draw the fluid through it.

Different flow configurations may be used for the flow control circuit. For example, Jal, these formations can include additional sample chambers. One or more pumps may be located in one

One or more flowlines in all parts of the circle. Various combinations of valves and 5 flow lines can also be provided to allow pumping

Y44Yy

1 and/or to the sample chambers and transferring the fluid 18 to wellbore sample chambers from dn SY as shown in Fig. AY) and the flow circuits may be positioned adjacent to and connected downhole tool idl 83k that all parts of the flow circuits may be placed around and in some cases the positions of the parts of the flowlines can be adjusted fluidly by flowlines © oll the flowlines in modular units that connect with each other in different configurations To form a bottom equipment Multiple flow circuits can be joined in different locations to be a human bottom feeder Downhole tool Multiple flow circuits can be joined in different locations and/or in different formations A downhole tool to connect one or more flowlines One or more of the downhole tool ill may be used together in all parts of the accompanying 0 downhole equipment (£3) shown in the balancing flowline (; i) and the valve flow line and connected to the valve. One or more of these flowline valves may be placed (75) in the drawings, with the flowline for evaluation and/or cleaning, along the flowlines (453) yall valves and the bore hole. This allows the differential pressure balance of the flowline to balance the pressure between the flow line so that the equipment does not stick to the ground formation tall and between the sell hole between the inner part 1 of the balance helps in the flowlines, and in addition to that, the flow lines. formation flowlines and compressed gases from the interior of the flowlines fluids drainage at valve sites and gases to the surface. This fluids valve may exist when those fluids rise, and balancing valves may be introduced. Different flowlines along one or more flowlines hold pressure at multiple locations. Alternatively, multiple Led; This is in cases where ©

No other valves (88) can be configured in a seal so as to open automatically and allow for pressure equalization in multiple positions. There are different types of valves that can be used to direct and/or control the flow of fluid through flowlines. Such valves may include check valves ¢ and/or crossovers and or flow restrictors [5], equalization valves [1] or valves For isolation or bypass and/or other devices that have the ability to control the flow of the fluid. These valves may be se valves that can allow a limited amount of fluid to flow through them. The threaded connection ( £A) Crossover Example of a valve that can be used Transfer 0 the flow from the evaluation (YA) flowline to the olf sampling circuit and to transfer the flow from the cleanout flowline to a second lie circuit; Then transfer the flowing samples to the second sampling circle ad flowline of cleaning up to the first sampling circle.One or more pumps may be placed through the flow lines 685 + in order to adjust the fluid flow 80 through them. The location of the pump may be used to assist in drawing the fluid through certain parts of the Bae 0 downhole tool. Pumps may also be used to push a fluid selectively through one or more flowlines at the required rate and/or pressure. The process of adapting the 5m pumps may be used to help determine the formation variables of the bottom of the blisters (Jie), the pressure of the formation fluids, and the movement of the fluids5. Typically, the positions of the 5m pumps are set so that the flowlines ve and the valves are used to adapt the fluid flow through the system 0. For example, it is possible to place

vy — - one or more pumps before and/or after certain certain valves, sample chambers ¢ or sensors; gauges or other devices.

The pumps may be selectively activated and/or coordinated to draw fluid into each of the flowlines as desired. and for example; It is possible to increase the pump rate of a pump connected to the clean-up flowline and/or decrease the pump rate of a pump connected to the appraisal flowline; This optimizes the amount of clean fluid drawn into the appraisal flowline. One or more of these pumps may be placed along the flowline. This is to selectively increase the pumping rate of the fluid

,. flowline passing through the flow line fluid 0 fluids devices: fluid analysis Jae sensors One or more sensors may be provided (7;) (Described in US Patent 9947971;__assigned to the owners) Various types of sensors (IVA (the present invention) are used); pressure meters such as content; and/or pollution levels; and/or Jil materials to determine the bottom 5 chemical parameters (the percentage of some chemicals; and/or the hydromechanical properties (viscosity1, etc.); and/or the “phases”; the percentage of some phases density; viscosity and/or electrical resistivity (such as electromagnetic resistance) o(electromagnetic) and or dynamic properties (such as temperature) thermal properties and or properties “mass flow meter or volume axa (eg dynamic) and/or properties “emission or absorption (eg optical 0)

P - Radiological “and/or pressure” and/or temperature “and/or salinity” and/or pH and or radioactivity Gamma lela radiation, Neutron and spectral energy; and/or oS content and/or Clay Composition and its contents; and/or oxygen content Oxygen 00 and/or Other data about the fluid; and/or related bottomhole states and conditions, among other variables. Sensor data « 5] may be collected or transmitted to the surface; and/or processed downhole. ill Preferably one or more sensors are pressure (YA) meters placed in the evaluation flowline (4?a) or the cleanout flowline 0 (VA) or across each eis as well as to measure the differential pressure between them Additional meters may be located at various locations along the flowlines 5 Pressure meters may be used to compare pressure levels in corresponding flowlines and for other diagnostic purposes and/or analytical. Here, measurement data is collected and/or transmitted to the surface and/or processed at the bottom of the well and used in conjunction with the sensor data to determine the states and conditions of the bottom of the well and/or to make relevant decisions. One or more sample chambers may be located at different locations along the flowline. In the attached figures and drawings, only one sample chamber with a Se cut is shown for ease of illustration. However, it should be recognized that one or more different sample chambers may be used. The sample chambers may be interconnected with flowlines 0 extending to other sample chambers and/or to other parts of the bed equipment. downhole tool ill; a

-Yo-

and/or to the drilling hole and/or to other filling chambers. There is AB on sample chambers and their related forms; These can be viewed in patent / US patent applications Nos. 7007647071, 21437844 and 1389177 which are assigned to the owners of this invention. Preferably, the sample chambers are positioned so that a clean fluid is collected. In addition, it is preferable that the location of the sample chambers be adjusted so that a clean, high-quality, ground-forming fluid can be effectively obtained. The fluid may be collected from one or more flowlines; And that in one or more of the sample chambers; and/or thrown into the borehole. There are no requirements for a sample chamber; Specifically

In a cleaning flowline that contains a contaminated fluid.

0 In some cases sample chambers and/or specific sensors are placed Jie Fluid Analyzer; This is near the probe and/or before the pump. Sometimes it is useful to sense the fluid variables from a point closer to the ground formation; or from the fluid source. It is also useful to perform testing and/or obtain samples prior to pumping. Typically, the pump stirs the fluid passing through the pump; This permutation leads to

ve distribute and spread contamination in the fluid passing through the orifice and/or increase the time needed to obtain a clean due. Pre-pump testing and sampling can avoid fluctuation and cross-contamination. It is preferable to provide a computer or other system for processing; This is to selectively activate different types of devices in the system. Processing equipment may be used to collect, analyze, aggregate, and communicate bed of blisters data.

Bhan can adapt the downhole tool Jl to perform commands in response to the processor; These commands may be used to perform downhole operations. When operating, a downhole tool Lidl (Fig. Wellbore wellbore wall Support pistons (101) extend to assist in ada bottom tool All p01p00”0_probe to engagement position 0 and selectively activate one or more pumps pumps (71) 001 downhole equipment for drawing fluid 8 into one or more flowlines (Fig. AY) as fluid is drawn into flowlines by pumps pumps and direct them through the flowlines 0 required by the valves. Figures (4a; Hb-©) show the fluid flow to a probe with multiple flowlines such as those shown in figures ? and/or “. These illustrate Figures The technical methods used in adapting the flow of the fluid (fluid to saad) to facilitate the flow of the clean fluid to the flowline of the evaluation and to reduce the degree of contamination.In each of these figures the fluid flow process is shown to 0 the (VA) probe and through the evaluation flowline (YA) and the cleanup flowline (F). The pumps are shown schematically (08) pumps? 1), and they are operationally connected to the flow lines (A) flowlines (D) (1) in a row, in order to draw the fluid through them. As shown in the figure. Pump (17) at a higher rate than the rating pump (70), however, it is possible for these two pumps to operate at the same rate, or 0 for the cleaning pump to operate at a higher rate than the rating pump.

yy - - only one pump for each of the flowlines however it is also possible to use any number of pumps across either of the two flowlines; And those pumps are the same as the (YT) pumps shown in the figure = Y

and with reference to the figures FE); pronounce ); Shown here are the pumps (+1 17) in mode 1 asynchronous operation. A Tt graph graphically shows the Q flow rate (axis ( ) versus time t (x-axis) for a fluid passing through the YA flowline

the cleaning flowline (0©); They are represented by lines (V1) and (14), respectively. Figures (CP-1b) show the operation of the pumps and the flow of the fluid.

to the probe at points A - 2 respectively in the graph shown in Figure Je

0 At point A in the ft figure the pumps are turned on and also the fluid is withdrawn to the corresponding flowlines for evaluation and cleaning. As shown in the form; a part of the

formation fluid to the evaluation flowline; and passing part

Al from this fluid to the flushing flowline. It is preferable here that the contaminated fluid (04) be drawn into the flowline of the cleaning flowline. in which

Only the clean fluid flows into the rating flowline as indicated by the arrows. and at point B in the TE figure the flushing pump is stopped; With the rating pump still running. It appears from the corresponding flow rates of the pumps at point B that the flow rate (14) through the cleaning flowline decreased » while the flow rate (17) continued during

The flowline of the assessment. As shown in Figure B - ?, the fluid is not withdrawn

v- contaminated fluid to the cleaning line and away from the evaluation line. In this case it may

And

M" -

Draw both the clean fluid and the contaminated fluid into the flow line

. of evaluation as shown by the stock flowline

And at point C in the form of; the two pumps carry out the pumping process; This increases the flow rate

(£1) for the cleaning line. As shown in Figure A-4, the two pumps return to operating mode as shown below.

0 described this before in relation to point a.

At point D. in Figure A; the cleaning pump performs the pumping process while the evaluation pump stops.

It is evident from the flow rates corresponding to the pumps at point D that the flow rate is

(7145) During the cleaning flowline the rate is continuous while the flow rate is decreasing

flow rate (17) through the appraisal flowline. As shown in Figure B-0, the fluid is not drawn into the appraisal flowline, in which case the

Draw both the clean fluid and the contaminated fluid into the flow line

,. for cleaning as shown by the arrows flowline

and with reference to figures ("fo b - £ ); Pumps (20; 17) operate in an operational mode

synchronous. These shapes are similar to shapes (a; b-); Except that BS of the two pumps 1 stops operating at points B and D. At points B and D in Figure #a, the flow rates (Jig) decrease

7) When the pumps stop. As shown in the figures ( hb-?; (£m) depends

The fluid flow to any of the flowlines when the pumps are turned off.

With reference to figures) 11; 7b -; ※ shows pumps (10; 17) in operation

in a simultaneous vertical pattern. These figures are similar to figures ( 14 = f 4 ); Except that the pumps have stopped running at point B in Figure 1a, flow rates decrease

And

(11) ya - - et) when the pumps 5H stop operating. As shown in Figures 1B - Y, the fluid flow stops when the pumps to any of the flowlines are turned off. Referring to the figures 0 Vv (lap-©); The pumps (+1 17) operate in a vertical synchronous 0 pattern. Figures (IV) / Ab-0) are similar to the figures TE (cb-o£ except that at point B the Coat pump is actuated) and according to the rating pump; At Adil c both pumps are deactivated; Whereas, at point D, the cleaning pump is turned on and the evaluation pump is stopped. In addition, the additional point (E) appears, at which point both pumps are switched on. In the resulting curves (217 218) in figure IV, it is clear that the flow rate through the cleaning 0 line is less than Adal c, while the flow rate decreases through the evaluation line for a period of time extending from points b to D. Referring to figures TA (Hb-0) the pumping and sample acquisition processes are shown here. In this case the pumps (+1 17) operate in a vertical synchronous pattern in (JS) AV (Lab-0); However, sampling may be carried out here according to any of the patterns vo described. These shapes are similar to the shapes TV (Lab-#); Except that the sample chamber (¢£Y) sample chamber here is connected to the flowline of the evaluation in figures (A) b- ((0 = A 1) and the (TA 11) valves appear along the Flowline (YA) These serve to divert fluid 0 selectively into the sample chamber Preferably the valves are activated and/or the fluid is delivered to the sample chamber chamber 0 at the point where the clean fluid led is present in the flow line Y44y

the

pala flowline is rated. In the pattern described in Figures (18 6b-©); is taken

Samples after circulating pumps; This is to ensure a clean fluid flow through the flow line

We returned “0_ for evaluation (YA) and as shown in the figures (Hb-Yooh); is closing

Valve (11) and opening the (VA) Valve at points A - C in the pumping process.

© It appears in Figure (4b-4) and at point D the valve (V1) opens and the valve (Valve) closes

(A) to allow the fluid to start flowing into the sample chamber (17). And as it appears

At point E in Figure B-0 the fluid begins to flow into the sample chamber

.sample chamber

Figures (+; Hb-©) illustrate a specific sampling process used in conjunction with the pumping pattern. Sampling may also be used in conjunction with other pumping patterns such as those described in

Figures (;- 1). It is preferable that the pumping and sampling operations be adapted so that a fluid is withdrawn

40 clean to the sample chamber and/or withdraw the contaminated fluid

0_away from it. The fluid may be tracked through the flowlines to detect

pollution. In all cases of contamination, the fluid may be transferred from the sample chamber 1 to the wellbore, for example.

Lind may adjust the pressure in the flowlines using other devices to increase and/or

To reduce pressure in one or more of the flowlines. For example it may be

Return of the pistons in the sample chambers and preliminary tests for drawing

fluid in it. charging techniques may be used; And the “valves” and the hydrostatic pressure 0 and others in order to adjust the pressure in the flowlines.

As long as we must realize through the previous description that there are various modifications and changes that can be made to the preferred models and alternative models in the present invention without deviating from the content and scope of the invention. The devices used here may prefer a manual and / or automated method to perform the gest pall process, and this will be based on the algal data, the conditions and cases that have been detected, and / or © by analyzing the results obtained by Lede in downhole operations. This description is intended as illustrative only and is not intended to limit or limit. It is obligatory to stand on the scope of this invention only through the roll of protections that follow it. In the protection malic the term "includes" that at least Jas means the elements mentioned in the claims within an open set of elements. The articles used in the singular 0 form also include the plural forms of those forms unless they are excluded Exactly that.

Claims (1)

Als - Elements of protection 1-1 formation evaluation system 0 for use in a downhole tool placed in a wellbore that penetrates 7 the formation and this formation contains a virgin fluid and a contaminated fluid ¢ 40 . This system includes the following: ° - at least 08) of the entry ports for receiving fluids ‎ae fluids ‎formation; ba - 1 at least an aly flowline for evaluation is fluidly connected to at least one of the 7 call ports in order to pass the virgin fluid to the bottom of A downhole. q - At least one of the flushing flowlines Ve is fluidly connected to at least one of the inlet ports; This is to pass the contaminated fluid 11 to the bottom hole tool Jill 83s. VY -_At least one fluid circuit that is fluidically connected to the flow lines | rather than evaluation and/or cleaning flowlines; This is to selectively withdraw the fluid ¢\ into them; Vo - at least one fluid delivery device and for making a Vv selective fluid connection between rating and/or cleaning flowlines; Vv - at least one sensor to measure human bottom variables in at least one of the 85 assessment flow lines and at least one of the 14 assessment clean lines; and combinations thereof. Y44Yy — secret _ 1 "- the formation evaluation system according to the element Y of protection 1 and also includes a fluid combination device that extends ¥ from a housing tightly coupled to the wellbore wall With a fluid combination ¢ device through which at least two of the inlet openings extend. at least 1 Jia 7 fluid connector to pass fluid 40 from the pre-part in at least one of the appraisal flowlines to the after-part in at least one of the clean-up flowlines; and to pass fluid 1 from the anterior portion in at least one of the cleanup flowlines 7 to the a posteriori portion in at least one of the sample flowlines A; and a combination thereof. A formation evaluation system according to either protection element Y or oY where at least one of the 7 fluid connectors is connected to the flowlines at a location located before one ¢ At least one of the shutoff valves of the evaluation flowline © flowline; and at least one flushing flowline shut-off valve 1 and a combination thereof. Y44v dos _ 1 0— A formation evaluation system according to any of the 1 Claims 1 or oF SY where at least one of the 3 fluidic contact devices is connected to the 8 flow lines at also located After at least one ¢ of the rating's 8 flowline shutoff valves; at least one valve to close the cleaning line; And a combination of that. 1 1- The formation evaluation system according to any of the protection elements Y 1 or oY and the Lind includes at least one balancing valve ¥ extending from at least one of the flowlines for evaluation; at least one ¢ of the cleaning flowlines; And a combination thereof: 0 to make a fluid contact on the wellbore. —Y 1 formation evaluation system under either Y of claim 1 or oY where at least one of the fluid circuits 3 includes at least one pump out of 53 > fluid circuits on at least one pump e fluid circuits on one pump on JN and at least one sample chamber;. With at least one valve to selectively withdraw 0 and 0 through the downhole tool Jill. Blas -A formation evaluation tool according to either Y protection element 1 or ?; and where there is at least 1 ali sensor to measure fluid properties in at least one of the ¢ flowlines of the evaluation; and for cleaning »; and a collection of those lines. 144v dos" - 1 - A formation evaluation system according to either “- protection elements 1 or oY” and includes Lad at least one of the 1 presses the initial test is operationally connected to at least one of the flowlines ¢65!” for evaluation” and at least one of the o flowlines for cleaning; and a combination thereof. 0-1 a formation evaluation system according to any of Y protection elements 1 or of and the Lind includes at least one isolation valve Y that selectively allows the flow of fluid through at least one ¢ of the rating flowlines; at least one of the 8 flowlines of cleaning; And a combination of that. 1-1 method for evaluating a subterranean formation with virgin fluid and a contaminated fluid; The method includes: 1 - Adjusting the position of the Bane downhole tool ji in a wellbore ¢ that penetrates the formation; Bane bottomhole tool ull include oil o at least one of the inlet ports; These prepare the fluid to be drawn into line 1 of at least one of the evaluation flowlines and at least one of 7 of the flushing flowlines of the A downhole tool; 9 - Selectively withdraw fluids into at least one of the 1 evaluation flowlines; And at least one of the 11 flow lines and our sticks »10? for cleaning; and a combination of that; F Single Cope on flowline Make fluid contact selectively between at least one VY flowline of the least rated flowline; and flow line VY \K to clean up; 1 - Measurement of fluids at the bottom of the well in at least one of the evaluation flowlines. and at least one of the VY flushlines; And a combination of that. VY) method according to the element of protection (0) and also includes the passage of fluids Pla fluids Y fluid circuit . NY 1 method according to protection element VY in which the fluid is pumped into the Y fluid circuit by at least one pump. VE 1 method of claim 11; in which the step of making a selective Y fluid connection comprises passing the fluid from the pre-part in at least one of 7 of the rating 85 flow lines to the after-port in one line at ¢ least of the cleaning flowlines”; passing of the fluid from ° the anterior part in at least one of the flowlines of cleaning 1 to the aft part of at least one of the flowlines of non-evaluation; And a combination of that. Ya4qy name -1#1 method of claim 0) and in which the step of making a fluid connection selectively involves connecting the flowlines 88 at a location located prior to at least one of the 7 shutoff valves of the flowline of anil ¢ the shutoff valve of the flowline 8 for cleaning; And a combination of that. 1 - The method according to Claim 11, in which the step of making a fluid connection selectively includes connecting the flow lines 5 at the aly location at least 1 from the shutoff valves of the flowline of the ¢ of the two valves. the shutoff valve of the flushing flowline; © and its successor. 1-1 method under claim 0) Lad comprises making a selective fluid connection between the wellbore and at least one of the 3 10185 appraisal flowlines and at least one of the 1 cleanup flowlines; And a combination of that. (SYA) method according to claim (0) and also includes analysis of the Y variables that were measured in the downhole ill. 0-1 The method is according to the claim element VA, in which the blistering bed variables of the flow step Slow are compared. a Lesson 0-1 method according to claim A and if the variable measured in Y bottom JA is a differential pressure between at least one of the 7 8 flowlines of the evaluation; and at least one of the cleaning flowlines. -71 \ Method of claim 11 in which the downhole equipment Y 001 comprises a set of fluid circuits connected to at least one of 7 fluid circuits connected to at least one of flowlines ¢; Each of the fluid circuits contains one pump at (JB°) and where the intake lines include the pumping of fluids selectively into at least one y of the rating flowlines. Cleaning; who does not RUIN pumps Method of claim 19; In which pumps - 7” 1 are operated to the contaminated fluid flowline selectively to prevent the flow of contaminated fluid Y of the rating. flowline v \??-method according to oF protection) and also includes pumping fluid Y from the evaluation flowline into one on JAY of the sample chambers.