CN104018828A - Meander river sand body reservoir building structure analysis method based on evolution process - Google Patents
Meander river sand body reservoir building structure analysis method based on evolution process Download PDFInfo
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Abstract
The invention discloses a meander river sand body reservoir building structure analysis method based on the evolution process. The meander river sand body reservoir building structure analysis method includes the following steps that firstly, the river evolution process is restored, a building structure and distribution characteristics of a river sand body are rebuilt, and determination of a single river channel, analysis of the river channel evolution direction and recognition of a meander bar are conducted; distribution and evolution characteristics of lateral accretion bodies and lateral accretion interlayers inside the meander bar are analyzed, a fine reservoir internal building structure is built, and discrimination of the direction of the lateral accretion bodies in the meander bar and the inclination direction of the lateral accretion interlayers, judgment of the dip angles of the lateral accretion interlayers in the meander bar and acquisition of vertical interlayer intervals and plane development intervals of the lateral accretion interlayers inside the meander bar are conducted. The method has the advantages that the internal structure of the sand body is accurately analyzed, and the matching degree of an analysis result and real evolution is increased, and can be widely applied to the technical field of exploration and development of oil and gas.
Description
Technical field
The present invention relates to oil-gas exploration and development technical field, particularly relate to a kind of meandering stream Sandbody Reservoirs structural analysis method based on evolution process.
Background technology
Along with the needs of oil field development, increasing geology expert starts again to pay attention to single sand body interior architectural applications structure and reservoir heterogeneity, seepage field, injectant displacement effect and remaining oil is formed to the control action distributing.Domestic some oil field main force interval is grown the meandering stream and the meander delta reservoir that blazon, and its inner structural features has become the principal element of current control remaining oil distribution.As far back as the eighties in last century, older generation's geologist just recognizes the impact of different reservoir structure features on exploration and development, the Development characteristics of reservoir of the same type has been discussed, and the particularly impact on exploitation every interlayer of fluvial depositional reservoir inside, has formed basic skills and thinking that fluvial facies are studied.After the nineties, domestic feature to river, segmentation and fine sedimentary facies research is more deep, not only relates to aeolotropic characteristics and the exploitation Flooding Characteristics of the substratum of the main force, also expands to the even characterization technique of off-balancesheet reservoir of the non-main force.Since entering this century, Reservoir Architectural is analyzed point-score becomes the mainstream technology that fluvial depositional reservoir non-homogeneity characterizes gradually, based on dense well pattern, horizontal well and modeling and digital-to-analogue technology, the sign of the structure to reservoir and Development response feature is more deep, has made technical place mat for further developing to adjust.But in characterizing, reservoir internal construction often focuses on sand body plane distribution, consider more single sandbody features, seldom sand body syntagmatic can be analyzed from sedimentary evolution process, make anatomical results cannot accomplish to mate completely with true evolution process, the forming process of sand body can not obtained to rational explanation, this indication anatomical results may represent a process that can not occur, this causes Some Domestic scholar to start to suspect the reliability of analyzing conclusion, also has influence on the effect of characterization result in exploitation is adjusted.
For the contradiction between sand body syntagmatic anatomical results and true evolution process, domestic theoretical circles have been done a large amount of research work, to ensureing authenticity and the reasonability of anatomical results, but due to the problem of Research Thinking, do not obtain all the time larger progress in this field.
Summary of the invention
The object of the invention is the deficiency in order to overcome above-mentioned background technology, a kind of meandering stream Sandbody Reservoirs structural analysis method based on evolution process is provided, to precisely dissecting sand body internal construction, improve anatomical results and the true matching degree developing.
A kind of meandering stream Sandbody Reservoirs structural analysis method based on evolution process provided by the invention, comprise the steps: one, reduction river evolution process, reinvent building structure and the distribution characteristics of river channel sand, comprise the identification of confirmation, river channel evolution Orientation and the point bar of single river channel; Two, analyze the long-pending body of side of point bar inside and the distribution and evolution feature of lateral accretion interbed, set up Fine Reservoir interior architectural applications structure, comprise the judgement at lateral accretion interbed inclination angle in the long-pending direction in point bar inner side and the differentiation of lateral accretion interbed tendency, point bar and the peace surface development interval, vertical interlayer interval that obtains the long-pending interlayer in point bar inner side.
In technique scheme, described step 1 comprise following some: the confirmation of (one) single river channel: in conjunction with isopach map of sand bodies, identify single river channel mark in river course band and differentiate Dai Yufei river course, river course band, the log based on different sedimentary micro sand bodies shows the development position in river course; (2) analyze river channel evolution direction: the final discarded position in identification river course and the initial position in given river course, trend based on isopach map of sand bodies and Evolution, in conjunction with the form of log, determine final discarded position, and in river course band position of center line near, provide streamline position, original river course along more straight direction; Determine different channel deposit centers with isopach map of sand bodies, based on abandoned channel, the single river channel having identified is carried out to phase time combination, the streamline distribution with different curves signs river course in different times river wriggle form, draws the evolutionary process in different times river; (3) identification point bar: taking the curved band of the determined height of streamline, inner side, abandoned channel and high caliper zones as mark, determine point bar development position and draw a circle to approve growth scope; Described step 2 comprise following some: the long-pending direction of (one) point bar side and lateral accretion interbed tendency sentence knowledge: the evolution direction of confirming point bar sand body according to point bar sand body streamline, wherein, the tendency of point bar sand body is consistent with evolution direction, the outer convex direction of streamline is the long-pending accretion direction in point bar side, is also the inner lateral accretion interbed incline direction of point bar; (2) judgement at lateral accretion interbed inclination angle in point bar: the inclination angle judgement of lateral accretion interbed mainly contains two sources: the lateral accretion interbed contrast in (1) antithetical phrase well, according to well site adjacent there is more closely-spaced antithetical phrase well, directly contrast lateral accretion interbed, obtain the tendency of lateral accretion interbed; (2) the single lateral accretion interbed based on rock core identification is determined the inclination angle of lateral accretion interbed with respect to the inclination angle on stratum; (3) plane of obtaining the long-pending interlayer in point bar inner side is grown interval: the growth interval of lateral accretion interbed comprises peace surface development interval, vertical interlayer interval, vertical interlayer interval is confirmed by the lateral accretion interbed of well point Direct Recognition, and is able to accordingly confirm the development position of vertical interlayer interval in well point from rock core or log; Plane is grown interval and is calculated by vertical interlayer interval and lateral accretion interbed angle, i.e. plane growth interval equals vertical interlayer interval and lateral accretion interbed inclination angle cotangent is long-pending.
In technique scheme, in (2). (1) of described step 2, the tendency of lateral accretion interbed need to be done angle correct with respect to streamline; In (2). (2) of described step 2, the dip correction on stratum need to be used in the inclination angle of lateral accretion interbed.
In technique scheme, described step 2 also comprises following content: (four) lateral accretion interbed forecast of distribution: plane is grown to interval numerical value and distribute and river channel evolution streamline in conjunction with the lateral accretion interbed of well point, determine that the lateral accretion interbed in plane distributes, establishment point bar internal plane structure chart.
In technique scheme, in described step 1 1) point, log comprises individual well log and connects borehole logging tool curve.
The meandering stream Sandbody Reservoirs structural analysis method that the present invention is based on evolution process, has following beneficial effect:
1, the river evolutionary process method of reinventing provided by the invention can be reduced form and the position that many phases of river swing well, has improved the cognition degree to research area's depositional environment, makes result have very high interpretation;
2, the present invention carries out the dissection of sand body internal construction on the basis of having reinvented river evolutionary process, well logging based on meticulous and rock core recognition technology, identification for point bar inside lateral accretion interbed has higher reliability, has improved anatomical results and the true matching degree developing.
Brief description of the drawings
Fig. 1 is the division mark schematic diagram that the present invention is based on single river channel in the embodiment of meandering stream Sandbody Reservoirs structural analysis method of evolution process;
Fig. 2 be the present invention is based in the embodiment of meandering stream Sandbody Reservoirs structural analysis method of evolution process for judge abandoned channel and latter stage river course SII1+2b isopach map of sand bodies;
Fig. 3 is the identification schematic diagram that the present invention is based in the embodiment of meandering stream Sandbody Reservoirs structural analysis method of evolution process river course in latter stage on the little layer plane of SII1+2b;
Fig. 4 the present invention is based on SII1+2b unit and river course in latter stage, SII12 unit spread figure in the embodiment of meandering stream Sandbody Reservoirs structural analysis method of evolution process;
Fig. 5 the present invention is based on river course swing analysis figure in the embodiment of meandering stream Sandbody Reservoirs structural analysis method of evolution process;
Fig. 6 is the measurement of dip angle schematic diagram that the present invention is based on shale coating layer in the embodiment of meandering stream Sandbody Reservoirs structural analysis method of evolution process;
Fig. 7 the present invention is based on the long-pending body plane distribution map of side in the embodiment of meandering stream Sandbody Reservoirs structural analysis method of evolution process;
Fig. 8 is the schematic flow sheet that the present invention is based on the meandering stream Sandbody Reservoirs structural analysis method of evolution process.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail, but this embodiment should not be construed as limitation of the present invention.
Referring to Fig. 1 to Fig. 8, the meandering stream Sandbody Reservoirs structural analysis method that the present invention is based on evolution process is described further taking the husky backlands of Daqing oil field district as embodiment.
It is early stage to Nenjiang group late period that the Daqing oil field Sa regional SII1+2b in north and SII12 substratum are formed at Yao Jia group, in down warping region process, whole basin settling rate obviously slows down, weather is from the dry moist climate that becomes, northern erosion source region lifting, thing source is abundant, gradient is more slow, and lake strandline, near area in Sa, is the high bent portions fluid stream channel of delta plain.Sand body distributes extensively, core intersection is large, the more interchannel deposit of the inner distribution in river course.Sand body inside is taking the multistage rhythm as main, the feature that river course has bifurcated to converge, and sand body is obvious ribbon, and meander is larger, is the high bend flow river on delta plain.
For this region, the present invention carries out Sandbody Reservoirs structural analysis by the following technical solutions:
One, reduction river evolution process, reinvents building structure and the distribution characteristics of river channel sand
First go out river course band sand body and non-river course band sand body according to individual well log and company's borehole logging tool Curves Recognition, wherein, natural potential (the SP of river course band sand body, spontaneous potential) and gamma (GR, natural gamma ray) show as case dress on log, bell, bell, as B2-310-P50 well in SII1+2b layer; Non-river course band sand body is overflow bank deposition of river, and its natural potential and show as zigzag above gamma logging or low amplitude projection, as B3-342-P53 well.After identifying river course band sand body, then on the basis of river course band sand body, carry out the identification of single river channel.
(1) single river channel identification
Different origins sand body difference to some extent all in lithology, electrical peaceful section geometric shape, therefore utilize well data abundant under dense well pattern condition in conjunction with the characteristics of combination on tracing pattern and the space of the feature of high camber meandering stream river evolution, each well point, comprehensively identify single river channel.And the identification key of single river channel is the identification on single river channel border, on the basis of identification river course band, determine the distinguishing mark on 4 kinds of single river channel borders, possess these 4 kinds of distinguishing marks simultaneously and just can delimit single river channel border, specifically referring to Fig. 1.
(1) discontinuous interchannel sand (claiming again non-river course band sand body)
The large area sand body that on Plain, certain limit distributes is to be put together by many river course side direction, but occurs always bifurcated between two river courses, leaves the sedimental trace of interchannel, divides different river courses according to the discontinuous interchannel sand distributing along river course.Poor and the thin thickness of interchannel sand physical property shows as dentation or low amplitude projection, as B3-342-P52 and two mouthfuls of wells of B3-342-P53 on log.
(2) abandoned channel
In meander belt inside, abandoned channel represents the end that a point bar is grown, and Final Issue time abandoned channel represents changing its course of first phase river deposition, so can divide single river channel according to abandoned channel deposit thing.Natural potential and gamma curve that abandoned channel shows as bottom on log are box or bell, top or near baseline or show as dentation, and bottom reflection argillaceous sediment, top reflection sand mud deposits alternately, as B2-311-P47 well.
(3) river channel sand difference in thickness
Because the shunting ability in different river courses is subject to the impact of many factors, will inevitably there is difference in different river channel sand thickness, cause thus deposit must occur difference on thickness, if this border can be followed the trail of within the specific limits, also can be used for dividing single river course, although as adjacent with two mouthfuls of wells of B2-310-P50 in B2-310-P49 but differ greatly on thickness, be different single river courses.
(4) tracing pattern difference
Different river courses, owing to being subject to depositing the impact of shape of the ancient end, have different deposit carrying capacitys, cause the log response characteristics in different river courses must have certain difference, and different tracing patterns can be used for carrying out the division of single river course.As two mouthfuls of B2-340-P52 and B2-340-P53, well is adjacent but form of logs is different, reflects different river channel sands.
(2) river channel evolution analysis
On the basis of dividing in single river course, identify log, and in conjunction with many sectional drawings and isopach map of sand bodies, the river course and abandoned channel in latter stage in determining in single river channel, defines the border of point bar by analyzing river evolutionary process, and concrete identifying is as follows:
(1) determining of river course in latter stage
After forming when new river course, current change its course, old river course has originally lost the effect as the current path of current gradually, form Lentic environment, river course hydrodynamic force a little less than, fine suspension material deposits gradually, deposit is taking shale as main, form on curve is similar to abandoned channel, after whole piece river course is filled with, sand thickness in single river channel in the plane should show as relatively continuous, a traceable sand body region for attenuate gradually, and comprehensively isopach map of sand bodies and sectional drawing are determined river course in latter stage.
(2) determining of abandoned channel
Be divided into 2 kinds of situations for the judgement of abandoned channel, first for the abandoned channel that has well point to control, can directly judge by form of logs, abandoned channel geometric shape is taking C shape or O shape as main, scale is also smaller, even under dense well pattern condition, also can not be controlled by well point completely, in subsurface reservoir, only have small part abandoned channel to be controlled by well point; Need comprehensively to judge for the abandoned channel that does not have well point to control, determine single river channel and latter stage river course basis on, according to sectional drawing and isopach map of sand bodies, if at meandering stream concave bank there is certain thickness sand body in place, both sides, abandoned channel log presents different features, and on isopach map of sand bodies, show as different sand thickness centers, think and have abandoned channel.
Taking Fig. 2 as example, the left figure of Fig. 2 is SII1+2b isopach map of sand bodies, B3-351 well array B3-351-P51 is to B3-351-P53 well, on isopach map of sand bodies, show as 2 mid-depths, be relatively thin region at middle B3-351-P52 well, river is bending left gradually in evolutionary process, therefore judges that B3-351-P52 is the place that latter stage, river course passed through, in Bu Wei abandoned channel, B3-351-P51 limit.
Referring to Fig. 3, according to the form of B3-352-P56 and B3-353-SP57 log, predict that this well point is the place that latter stage, river course passed through, by the region, river course in latter stage of predicting in conjunction with upstream B3-351 well array, be combined in the plane the river course in latter stage of adjacent 2 bends, think these 2 well points be latter stage river course pass through region.
Therefore by the signature analysis in conjunction with section peace face isopach map of sand bodies, in the plane after combination measurable go out latter stage river course, A figure and B that SII1+2b and the concrete river course of SII12 substratum form refer to respectively in Fig. 4 scheme.
(3) river course initial position
River course is always relatively straight in the time of new formation, and therefore, the initial position in river course is a relatively straight river.Due to the spiral water flow in river, concave bank is corroded later, convex bank deposition, river curvature increases gradually.
(4) river course swing analysis
For the SII1+2b substratum that is arranged in the left figure of Fig. 5, river course is initially 2 relatively straight single river courses, then curvature increases gradually, in the time increasing to a certain degree, due to flood effect, A river course at B3-D5 to the execution mouthful of B3-351 well array, form breach river course, river diversion, old river course is discarded gradually, and new river course is the predominating path that water body passes through; B river course changes its course at B3-360 well array, and channel line moves eastwards, and originally old river course is discarded, continues to develop in new river course, finally discarded in certain whole piece in period river course, forms river course in latter stage.For the SII12 substratum that is arranged in the right figure of Fig. 5, be also divided into 2 single river courses in the starting stage, specifically see streamline 3.1 and streamline 4.1 in Fig. 5, river course is bending gradually, river course westwards develops gradually in the east, and last 2 rivers converge in two river courses of B3-360-P51, merge into a river course downwards.
(5) river course streamline
Analyzing on the basis of river channel evolution, according to the evolutionary process in river course, the channel thread of given river channel evolution different times to.SII1+2b substratum in the left figure of Fig. 5, A river course is bending gradually by streamline 1.1, to streamline 1.2, finally develops to streamline 1.3, and whole piece river course is discarded, is river course in latter stage; B river course is by streamline 2.1-streamline 2.2-streamline 2.3-streamline 2.4-streamline 2.5-streamline 2.6, and it is discarded that river course finally arrives streamline 2.6, forms river course in latter stage.SII12 substratum in the right figure of Fig. 5, A river course is bending gradually by streamline 3.1, to streamline 3.2, finally develops to streamline 3.3, and whole piece river course is discarded, is river course in latter stage; B river course is by streamline 4.1-streamline 4.2-streamline 4.3-streamline 4.4-streamline 4.5-streamline 4.6, and it is discarded that river course finally arrives streamline 4.6, forms river course in latter stage.
(3) point bar identification
Point bar is the skeleton sandstone in meandering stream reservoir, is main oil storage unit, the therefore identification of point bar and important.The identification of point bar is mainly to identify by tracing pattern, sandbody features and abandoned channel.River, in evolutionary process, in the time that abandoned channel forms, represents that a point bar growth finishes, therefore the existence of abandoned channel just indicates point bar growth, point bar is on log, and natural potential is mainly bell or box, is the region that thickness is larger on isopach map of sand bodies.
Two, the distribution and evolution feature of the long-pending body of the side of point bar inside and lateral accretion interbed, analyzes Fine Reservoir interior architectural applications structure
(1) judgement of lateral accretion interbed tendency
It is crescent that lateral accretion interbed is generally in the plane, and according to the long-pending process of side of point bar sand body, lateral accretion interbed always tilts to abandoned channel direction, can find out from made ground pattern, and the long-pending direction of side of lateral accretion interbed is to point to the concave bank of abandoned channel.
(2) judgement of long-pending body, lateral accretion interbed inclination angle and scale of side
Made ground and appear research show, the inclination angle that side deposition is draped over one's shoulders is generally 5 °～10 °.In the time of the point bar lateral accretion interbed inclination angle judging as shown in Figure 6, can judge by rock core information.Have certain thickness horizontal mud stone to proofread and correct by sand body top after, judge that B2-322-JP43 rock core shale inclination layer is respectively 6 ° and 10 °.
The inner lateral accretion interbed of meandering river point bar and stratum oblique, formerly judge the inclination angle that can judge by antithetical phrase well lateral accretion interbed on the basis of interlayer tendency, the vertical difference according to well spacing and lateral accretion interbed in the situation that of being defined as same interlayer in antithetical phrase well judges lateral accretion interbed inclination angle.Two mouthfuls of wells of SII1+2b substratum B3-361-P48 and B-D6-435, well spacing is 32.8, and the long-pending direction of side is for from west to east, and sand thickness is respectively the point bar sand body of 4.1 meters and 3.6 meters, definite same lateral accretion interbed vertical, vertical upper difference is 2.5m.Therefore judge that its inclination angle is arctan (2.5/32.8)=4.4 degree, on the basis of the long-pending body thickness of clear and definite side and angle, according to right-angle relationship, the level interval that calculates lateral accretion interbed is 16-20 rice, and the development length of lateral accretion interbed is 35.6 meters.
Comprehensive antithetical phrase well and rock core information, the inclination angle of estimation side deposition rock is main at 4 °～10 °.
(3) the long-pending body of side and muddy intercalation distribution characteristics
According to theoretical geological model, on fundamentals of forecasting between the identification of offside lamination individual well and well, in order to describe the distribution characteristics such as the long-pending direction of plane configuration, side, density of point bar sand body lateral accretion interbed, SII1+2b and SII12 substratum are set up respectively to 20 sections and be described, predicted lateral accretion interbed roughly form in the plane.
What Fig. 7 showed is the long-pending body section of SII1+2b substratum side and plane characteristic.In conjunction with the river channel evolution feature of the whole district, in river course, in northern and southern evolutionary process, the tracing pattern of B3-352-well array curve, is divided into 2 single point bars by upstream point bar, is divided into respectively the long-pending body of 6 and 10 sides, will be divided into the long-pending body of 11 sides near the point bar in downstream.
The river evolutionary process method of reinventing provided by the invention can be reduced form and the position that many phases of river swing well, has improved the cognition degree to research area's depositional environment, makes result have very high interpretation.On the basis of having reinvented river evolutionary process, having carried out sand body internal construction dissects, and well logging and rock core recognition technology based on meticulous, identification for point bar inside lateral accretion interbed has higher reliability, has improved anatomical results and the true matching degree developing.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
The content not being described in detail in this manual belongs to the known prior art of professional and technical personnel in the field.
Claims (5)
1. the meandering stream Sandbody Reservoirs structural analysis method based on evolution process, is characterized in that: comprise the steps:
One, reduction river evolution process, reinvents building structure and the distribution characteristics of river channel sand, comprises the identification of confirmation, river channel evolution Orientation and the point bar of single river channel;
Two, analyze the long-pending body of side of point bar inside and the distribution and evolution feature of lateral accretion interbed, set up Fine Reservoir interior architectural applications structure, comprise the judgement at lateral accretion interbed inclination angle in the long-pending direction in point bar inner side and the differentiation of lateral accretion interbed tendency, point bar and the peace surface development interval, vertical interlayer interval that obtains the long-pending interlayer in point bar inner side.
2. the meandering stream Sandbody Reservoirs structural analysis method based on evolution process according to claim 1, is characterized in that: described step 1 comprise following some:
(1) confirmation of single river channel: in conjunction with isopach map of sand bodies, identify single river channel mark in river course band and differentiate Dai Yufei river course, river course band, the log based on different sedimentary micro sand bodies shows the development position in river course;
(2) analyze river channel evolution direction: the final discarded position in identification river course and the initial position in given river course, trend based on isopach map of sand bodies and Evolution, in conjunction with the form of log, determine final discarded position, and in river course band position of center line near, provide streamline position, original river course along more straight direction; Determine different channel deposit centers with isopach map of sand bodies, based on abandoned channel, the single river channel having identified is carried out to phase time combination, the streamline distribution with different curves signs river course in different times river wriggle form, draws the evolutionary process in different times river;
(3) identification point bar: taking the curved band of the determined height of streamline, inner side, abandoned channel and high caliper zones as mark, determine point bar development position and draw a circle to approve growth scope;
Described step 2 comprise following some:
(1) what the long-pending direction of point bar side and lateral accretion interbed were inclined to sentences knowledge: the evolution direction of confirming point bar sand body according to point bar sand body streamline, wherein, the tendency of point bar sand body is consistent with evolution direction, the outer convex direction of streamline is the long-pending accretion direction in point bar side, is also the inner lateral accretion interbed incline direction of point bar;
(2) judgement at lateral accretion interbed inclination angle in point bar: the inclination angle judgement of lateral accretion interbed mainly contains two sources: the lateral accretion interbed contrast in (1) antithetical phrase well, according to well site adjacent there is more closely-spaced antithetical phrase well, directly contrast lateral accretion interbed, obtain the tendency of lateral accretion interbed; (2) the single lateral accretion interbed based on rock core identification is determined the inclination angle of lateral accretion interbed with respect to the inclination angle on stratum;
(3) plane of obtaining the long-pending interlayer in point bar inner side is grown interval: the growth interval of lateral accretion interbed comprises peace surface development interval, vertical interlayer interval, vertical interlayer interval is confirmed by the lateral accretion interbed of well point Direct Recognition, and is able to accordingly confirm the development position of vertical interlayer interval in well point from rock core or log; Plane is grown interval and is calculated by vertical interlayer interval and lateral accretion interbed angle, i.e. plane growth interval equals vertical interlayer interval and lateral accretion interbed inclination angle cotangent is long-pending.
3. the meandering stream Sandbody Reservoirs structural analysis method based on evolution process according to claim 2, it is characterized in that: in (2). (1) of described step 2, the tendency of lateral accretion interbed need to be done angle correct with respect to streamline; In (2). (2) of described step 2, the dip correction on stratum need to be used in the inclination angle of lateral accretion interbed.
4. the meandering stream Sandbody Reservoirs structural analysis method based on evolution process according to claim 3, is characterized in that: described step 2 also comprises following content:
(4) lateral accretion interbed forecast of distribution: plane is grown to interval numerical value and distribute and river channel evolution streamline in conjunction with the lateral accretion interbed of well point, determine that the lateral accretion interbed in plane distributes, establishment point bar internal plane structure chart.
5. according to the meandering stream Sandbody Reservoirs structural analysis method based on evolution process described in any one in claim 2 to 4, it is characterized in that: in described step 1 1) point, log comprises individual well log and connects borehole logging tool curve.
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| CN110858260A (en) * | 2018-08-17 | 2020-03-03 | 中国石油化工股份有限公司 | Method for describing plane distribution of sand bodies of single-stage river channel of delta river facies |
| CN110082835A (en) * | 2019-03-25 | 2019-08-02 | 中国石油化工股份有限公司 | Meandering river point bar loose sand reservoir properties novel method for modeling |
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