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Method for dividing gas well testing conclusions

A kind of conclusion and gas well technology, applied in the field of gas well test conclusion division, can solve the problems of generalization and unfavorable gas field development in the next step, achieve the effect of wide promotion prospect, convenient field application and operation, and reduce development risk

Active Publication Date: 2022-01-25
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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Problems solved by technology

Therefore, the definition of the gas-water layer is too general, which is not conducive to the further development of the gas field.

Method used

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  • Method for dividing gas well testing conclusions

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Experimental program
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Embodiment 1

[0028] The fluid production depends on the gas-water occurrence state and the seepage capacity of the reservoir. The gas-water phase permeability curve reflects the relationship between the fluid saturation change and the fluid phase seepage capacity. Therefore, this patent proposes to use the relative permeability curve theory and logging The results of fluid saturation interpretation are used to quantitatively describe the conclusion of oil testing test layer, and the flow partition of relative permeability curve is finely divided into six areas, (attached figure 1 , attached figure 2 ), respectively, the pure gas phase flow zone I, the small amount of water phase flow zone II, the gas-rich water-poor two-phase seepage zone III, the water-rich gas-poor two-phase seepage zone IV, the small gas phase flow zone V, and the pure water phase flow zone VI, Effectively correspond to the conclusions of oil testing and test layers. Zone I represents the pure gas zone, zone VI represe...

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Abstract

The invention discloses a method for dividing the oil testing conclusion of a gas well, which uses the relative permeability curve and the logging fluid saturation interpretation results to quantitatively describe the oil testing test layer conclusion, and finely divides the flow partition of the relative permeability curve into the oil testing test Effectively correspond to the layer conclusions, divide the oil test layer conclusions into seven layers, and quantify the division boundaries of each layer through the relationship between water saturation and water-gas ratio in the relative permeability curve, and use the partitions in the relative permeability curve Calculate the water-gas ratio corresponding to the boundary point of the boundary point and the natural gas volume coefficient of the target layer. The invention considers the gas-water phase state changes of natural gas and formation water, and combines the relative permeability curve theory and logging fluid saturation interpretation results to realize fine and accurate discrimination of fluid properties in oil testing and testing layers.

Description

technical field [0001] The invention relates to a method for dividing gas well oil testing conclusions, belonging to the development field of oil and gas exploration and development. Background technique [0002] It is difficult to directly obtain the occurrence status of oil, gas, and water in oil and gas reservoirs. It is usually determined by the production of fluids. The determination of oil test results is the key to the identification of gas and water in the process of oil and gas exploration and development. In some research areas, there are many sedimentary types, complex reservoir types, strong heterogeneity, and complex and changeable reservoir pore structure, which makes it more difficult to identify gas-water layers. Particularly important. [0003] At present, domestic (foreign) oil test results are mainly classified according to the types of fluids produced in the test. The results of the classification are only gas layer, water layer, gas-water layer, and dry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B49/00E21B49/08G06Q50/02
CPCE21B47/00G06Q50/02E21B49/00E21B49/08
Inventor 刘荣和孟中华张文彪李璐高仪君蔡坤赤
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD