CN105822295A - Stratum fracture and cave development three-dimensional modeling method - Google Patents
Stratum fracture and cave development three-dimensional modeling method Download PDFInfo
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- CN105822295A CN105822295A CN201610152172.XA CN201610152172A CN105822295A CN 105822295 A CN105822295 A CN 105822295A CN 201610152172 A CN201610152172 A CN 201610152172A CN 105822295 A CN105822295 A CN 105822295A
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- stratum
- logging
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- hole
- well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention discloses a stratum fracture and cave development three-dimensional modeling method. A logging mode of combining conventional logging and microresistivity scanning imaging logging is used, concrete fracture and cave parameter features are analyzed by combining core taking; the stratum is comprehensively subjected to fracture and cave recognition, so that the fracture and cave development stratum series and the concrete parameter features are unified; a stratum fracture and cave development three-dimensional model is built for solving the problem that the stratum fracture and cave development three-dimensional model is difficult to built in the prior art; the goal of building the stratum fracture and cave development three-dimensional model by a geological research measure is achieved.
Description
Technical field
The present invention relates to geological exploration and development field, relate in particular to seam hole, stratum and grow three-dimensional modeling method.
Background technology
Seam hole property stratum often has seam hole and grows irregular, and the features such as matrix porosity is low, permeability is poor, and reservoir space is distributed in length and breadth, anisotropism is the strongest are always geology and the difficult point project in engineering in developing of reservoirs.Affected by tectonic movement, often bury deeply, natural impedance difference is little by hole property stratum for seam, cause that seismic reflection is weak, resolution is low, seismic facies is disorderly, the resolution of seismic sequence and the relatively low feature of precision, therefore, the geological research for seam hole property stratum tends to use logging mode to carry out it more.But, conventional logging mode is when research seam hole property stratum, and specific aim is not strong, and cannot draw design parameter, it is difficult to sets up the threedimensional model grown in seam hole, stratum and studies for geological personnel.
Summary of the invention
It is an object of the invention to propose seam hole, stratum and grow three-dimensional modeling method, to solve prior art is difficult to set up the problem that threedimensional model is grown in seam hole, stratum, it is achieved set up the purpose of seam hole development model by geological research means.
The present invention is achieved through the following technical solutions:
Three-dimensional modeling method is grown in seam hole, stratum, in a certain oil-gas exploration and development block, according to geological conditions and goal in research demand, choose N mouth and there is the prospect pit of symbolical meanings, implement techniques below step (wherein, N is the positive integer more than or equal to 5): (a) during wellbore construction, for there being the layer position of oil/gas show to carry out coring operation, the rock core taken out is carried out electron-microscope scanning observation, nuclear magnetic resonance spectroscopy, show that parameter is oozed in its hole；B (), during wellbore construction, carries out conventional logging operation to full well section, well logging project includes resistivity logging, acoustic travel time logging, nutural potential logging, gamma ray log, compensated neutron log, density log, carries out well log interpretation；C () filters out in log, lateral resistivity curve forward difference deep, shallow, resistivity curve totally rise and fall and become big, interval transit time and compensated neutron increase, density reduction, the well section of natural gamma reduction；D () carries out micro-resisitivity image (FMI) to the well section filtered out in step (c), carry out FMI graphical analysis, gets rid of the non-natural seam hole caused because of drilling engineering, retains residue well section and grow well section for seam hole；E well section is grown in the seam hole of every mouthful of well by () respectively, hole is oozed parameter and imported modeling software, obtains seam hole, stratum and grows threedimensional model.
For prior art is difficult to set up the problem that threedimensional model is grown in seam hole, stratum, the present invention proposes a kind of seam hole, stratum and grows three-dimensional modeling method, the method is in a certain oil-gas exploration and development block, according to geological conditions and goal in research demand, choose N mouth and there is the prospect pit of symbolical meanings carry out job execution.Wherein, N is more than or equal to 5, and the i.e. selected prospect pit well location having symbolical meanings at least includes each a bite well in four orientation, trap all directions, and a bite well of trap high point.In drilling process, for there being the layer position of oil/gas show to carry out coring operation, this mode of coring is not limited to bottom hole coring or sidewall coring, the rock core taken out is carried out electron-microscope scanning observation, utilize high-definition picture produced by scanning electron microscope, examine and record the form of hole on rock core, width, length, corrosion and filling situation etc., rock core is carried out nuclear magnetic resonance spectroscopy simultaneously, determine seam hole size and throat width, these data are recorded preservation for the time being.Each barefoot interval is carried out conventional logging operation, well logging project includes but not limited to resistivity logging, acoustic travel time logging, nutural potential logging, gamma ray log, compensated neutron log, density log, and logging mode is wireline logging or well logging during.According to Logging Curves, therefrom filter out lateral resistivity curve forward difference deep, shallow, resistivity curve totally rises and falls greatly, interval transit time and compensated neutron increase, density reduces, natural gamma reduces well section, well section may be grown as seam hole；Afterwards the well section filtered out is carried out a micro-resisitivity image (FMI), and carries out FMI graphical analysis.Micro-resisitivity image is the one in imaging logging techniques, as identifying seam hole, stratum intuitively effective logging mode, individually carry out a FMI logging operation to be necessary, because FMI well-log information can highlight the rock acoustic impedance and the variation characteristic of resistivity caused because of the change of seam hole, reduce the impact in the non-natural seam hole caused by anthropic factors such as drilling engineerings, thus revise the error of Conventional Logs.Thus judge this well institute drilling strata stitches the concrete developing stratum on hole property stratum, rock core information in conjunction with corresponding well section acquired in step (a), thus obtain the respective feature on the seam hole property stratum of different layers position, the most respectively the seam hole development position of every mouthful of well, corresponding hole acquired from step (a) are oozed the design parameters such as parameter and imported modeling software, it is established that threedimensional model is grown in seam hole, stratum.
Additionally, in the present invention only to through screening well section carry out FMI logging operation, reduce operating cost, decrease the prospect pit construction period, reduce occur engineering accident risk, the most significant to drilling engineering field.
Further, in described step (a), institute's coring uses sealing core drilling mode to obtain.Compared to conventional mode of coring, sealing core drilling uses special gel sealing fluid to seal rock core, it is possible to prevent drilling fluid from infecting rock core impact experiment and analysis result.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, three-dimensional modeling method is grown in seam hole, stratum of the present invention, by the logging mode using conventional logging to be combined with micro-resisitivity image, in conjunction with analysis concrete seam hole parameter attribute of coring, stratum comprehensively carries out stitch hole identify, thus the series of strata that seam hole is grown are united with concrete parameter attribute, set up seam hole, stratum and grow threedimensional model, to solve prior art is difficult to set up the problem that threedimensional model is grown in seam hole, stratum, it is achieved set up seam hole by geological research means and grow the purpose of threedimensional model.
2, three-dimensional modeling method is grown in seam hole, stratum of the present invention, only the well section screened through conventional logging is carried out FMI logging operation, reduce operating cost, decrease the prospect pit construction period, reduce the risk sending out into engineering accident, the most significant to drilling engineering field.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the schematic process flow diagram of one specific embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1:
Three-dimensional modeling method is grown in seam hole, stratum as shown in Figure 1, in a certain oil-gas exploration and development block, according to geological conditions and goal in research demand, choose each orientation, all directions, plus the totally 5 mouthfuls of prospect pits with symbolical meanings of trap central point, implement techniques below step: (a) is during wellbore construction, for there being the layer position of oil/gas show to carry out sealing core drilling operation, the rock core taken out is carried out electron-microscope scanning observation, nuclear magnetic resonance spectroscopy, show that parameter is oozed in its hole；B (), during wellbore construction, carries out conventional logging operation to full well section, well logging project includes resistivity logging, acoustic travel time logging, nutural potential logging, gamma ray log, compensated neutron log, density log, carries out well log interpretation；C () filters out in log, lateral resistivity curve forward difference deep, shallow, resistivity curve totally rise and fall and become big, interval transit time and compensated neutron increase, density reduction, the well section of natural gamma reduction；D () carries out micro-resisitivity image (FMI) to the well section filtered out in step (c), carry out FMI graphical analysis, gets rid of the non-natural seam hole caused because of drilling engineering, retains residue well section and grow well section for seam hole；E well section is grown in the seam hole of every mouthful of well by () respectively, hole is oozed parameter and imported modeling software, obtains seam hole, stratum and grows threedimensional model.In the present embodiment, 5 well locations chosen are carried out prospect pit operation, in drilling process, for there being the layer position of oil/gas show to carry out shaft bottom sealing core drilling operation, the rock core taken out is carried out electron-microscope scanning observation, utilizes high-definition picture produced by scanning electron microscope, examine and record the form of hole on rock core, width, length, corrosion and filling situation etc., rock core is carried out nuclear magnetic resonance spectroscopy simultaneously, determine seam hole size and throat width, these data are recorded preservation for the time being.Each barefoot interval is carried out conventional logging operation, well logging project includes but not limited to resistivity logging, acoustic travel time logging, nutural potential logging, gamma ray log, compensated neutron log, density log, and logging mode is point band radioactive source and twice wireline logging without radioactive source is carried out.According to Logging Curves, therefrom filter out lateral resistivity curve forward difference deep, shallow, resistivity curve totally rises and falls greatly, interval transit time and compensated neutron increase, density reduces, natural gamma reduces well section, well section may be grown as seam hole；Afterwards the well section filtered out is carried out a micro-resisitivity image (FMI), and carries out FMI graphical analysis, thus revise the error of other Conventional Logs.Thus judge this well institute drilling strata stitches the concrete developing stratum on hole property stratum, rock core information in conjunction with corresponding well section acquired in step (a), the seam hole of every mouthful of well is grown well section, hole is oozed parameter and is imported modeling software, obtains seam hole, stratum and grows threedimensional model.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (2)
1. three-dimensional modeling method is grown in seam hole in stratum, it is characterised in that in a certain oil-gas exploration and development block, according to geological conditions and goal in research demand, choose N mouth and there is the prospect pit of symbolical meanings, enforcement techniques below step (wherein, N is the positive integer more than or equal to 5):
A (), during wellbore construction, for there being the layer position of oil/gas show to carry out coring operation, carries out electron-microscope scanning observation, nuclear magnetic resonance spectroscopy to the rock core taken out, show that parameter is oozed in its hole；
B (), during wellbore construction, carries out conventional logging operation to full well section, well logging project includes resistivity logging, acoustic travel time logging, nutural potential logging, gamma ray log, compensated neutron log, density log, carries out well log interpretation；
C () filters out in log, lateral resistivity curve forward difference deep, shallow, resistivity curve totally rise and fall and become big, interval transit time and compensated neutron increase, density reduction, the well section of natural gamma reduction；
D () carries out micro-resisitivity image (FMI) to the well section filtered out in step (c), carry out FMI graphical analysis, gets rid of the non-natural seam hole caused because of drilling engineering, retains residue well section and grow well section for seam hole；
E well section is grown in the seam hole of every mouthful of well by () respectively, hole is oozed parameter and imported modeling software, obtains seam hole, stratum and grows threedimensional model.
Three-dimensional modeling method is grown in seam hole, stratum the most according to claim 1, it is characterised in that: in described step (a), institute's coring uses sealing core drilling mode to obtain.
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| CN106887041A (en) * | 2017-02-23 | 2017-06-23 | 中国电建集团北京勘测设计研究院有限公司 | The geology three-dimensional modeling method and system of simulation geological phenomenon space development trend |
| CN106907140A (en) * | 2017-04-28 | 2017-06-30 | 新疆大学 | Hydrodynamic closure type coal bed gas high productivity layer position based on well-log information determines method |
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Application publication date: 20160803 |