Method for discriminating property of stratum fluid through gas logging efficiency value
A technology of formation fluid and efficiency value, which is applied in the field of judging the properties of formation fluid, can solve the problems of the influence of gas measurement parameters, the deterioration of the method effect, and the lack of consideration of gas measurement data information, etc., and achieve the effect of overcoming limitations and improving accuracy
Active Publication Date: 2018-05-08
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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However, with the continuous complexity of drilling technology and drilling fluid performance, the response accuracy of gas logging parameters to formation fluid properties decreases, and the effect of the method becomes poor. The main problems are as follows:
[0005] 3. Gas measurement parameters are seriously affected by engineering parameters, but the current fluid interpretation methods use gas measurement data that have not been corrected by engineering parameters, and there must be limitations
[0006] 4. The current fluid interpretation methods apply single-point data, that is, the gas data at a certain depth point, without considering the information contained in the changes in the gas data at depth
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[0024] With reference to accompanying drawing of specification sheet, as the best implementation mode of the present invention, it discloses a kind of method utilizing gas detection efficiency value to discriminate formation fluid property, and its steps are:
[0025] a. According to the gas release mode of the gas measurement display section, establish a calculation method for the gas measurement efficiency value;
[0026] b. According to the calculation method of gas testing efficiency value, calculate the gas testing efficiency value of the gas testing section in the drilling and oil testing section in the area, and optimize the fluid discrimination value according to the difference of the oil testing results.
[0027] c. Combining the gas measurement efficiency value calculation formula and the fluid discrimination value, a regional gas measurement efficiency value fluid interpretation model is formed.
[0028] In the step a, according to the gas release mode of the gas me...
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The invention discloses a method for discriminating the property of a stratum fluid through a gas logging efficiency value. The method comprises the steps that a, according to the gas release mode ofa gas logging display section, a calculation method of the gas logging efficiency value is built; b, the gas logging efficiency value of the gas logging display section of a drilled oil test section in an area is calculated according to the calculation method of the gas logging efficiency value, and a fluid discrimination value is selected preferably according to the difference of oil test results; and c, a gas logging efficiency value fluid interpretation model of the area is formed by combining a calculation formula of the gas logging efficiency value and the fluid discrimination value. A new parameter, namely the gas logging efficiency value, and the calculation method of the gas logging efficiency value are introduced, and therefore the logging interpretation measure is expanded; and meanwhile, the gas logging efficiency value of the gas logging display section is used as the fluid discrimination parameter, so that not only is the gas logging characteristic of gas logging display fully embodied, but also the limitation when a gas logging peak value is used as the gas logging display characteristic is overcome.
Description
technical field [0001] The invention relates to a method for judging formation fluid properties by using gas detection efficiency values, and belongs to the technical field of petroleum and natural gas exploration and development. Background technique [0002] Gas logging parameters are important parameters for mud logging interpretation. Especially for fluid interpretation, gas logging parameters are basically required, and are mainly based on the ratio difference between all hydrocarbons and each component in the gas logging data. to judge. However, with the continuous complexity of drilling technology and drilling fluid performance, the response accuracy of gas logging parameters to formation fluid properties decreases, and the effect of the method becomes poor. The main problems are as follows: [0003] 1. The current fluid interpretation method based on gas measurement parameters is mainly to find an effective fluid discrimination model through cluster analysis of regi...
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IPC IPC(8): E21B49/08
CPCE21B49/08E21B49/0875
Inventor 唐谢阮聪张梦琳赵磊何嘉
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD