Method for dividing formation testing conclusion of gas well

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, and achieve the effect of wide promotion prospect, convenient field application and operation, and guaranteed accuracy

Active Publication Date: 2019-11-12
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, w

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  • Method for dividing formation testing conclusion of gas well
  • Method for dividing formation testing conclusion of gas well
  • Method for dividing formation testing conclusion of gas well

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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 formation testing conclusion of a gas well. The method for dividing the formation testing conclusion of the gas well comprises the steps that a relative permeability curve and a log fluid saturation interpretation result are used for quantitatively characterizing the formation testing test-layer conclusion, and the flow partition of the relative permeability curve is finely partitioned to perform effective corresponding with formation testing test-layer conclusion, the formation testing test-layer conclusion is divided into seven layers, the division limit of each layer is quantified by the relationship between the water saturation of the relative permeability curve and the water-gas ratio, and meanwhile the water-gas ratio corresponding toa partition line point is calculated by using the partition line point in the relative permeability curve and a natural gas volume factor of a target stratum. The method for dividing the formation testing conclusion of the gas well considers the gas-water phase state change of the natural gas and the formation water, and combines the relative permeability curve theory and the log fluid saturationinterpretation result to realize the fine and accurate discrimination of the fluid property of a formation testing test-layer.

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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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
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