Evaluation method for fracture reservoir control
An evaluation method and evaluation index technology, applied in the field of petroleum geology, can solve problems such as different and inapplicable, and achieve the effect of a wide range of applications
Inactive Publication Date: 2020-09-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0021] ①The premise of the application of this method is that there is no shortage of oil sources in the fault area, and all faults are not included in the unified evaluation system
[0034] ① The statistical parameters proposed by this method may be very different in different basins, and the formulas proposed can only be applied to the basin itself studied by the author
This can only be applied to well-explored basins, and for a less-explored basin, this method cannot be applied due to the limitation of the number of samples
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[0068] The present invention will be further described below in conjunction with the accompanying drawings.
[0069] This embodiment provides an evaluation method for fault control reservoir, figure 2 The basic principle of the method is shown. The figure shows the caprock 100, the reservoir 200 and the source rock 300. In this method, all the faults in the study area are divided into four cases to study the controlling effect of the faults on the oil and gas reservoirs.
[0070] The first case is to analyze the connection between faults, source rocks and reservoirs during the main accumulation period. The best match between faults and source rocks during the main accumulation period is that the faults penetrate deep into the source rocks, and the faults also penetrate deep into the reservoirs during the main accumulation period. At this time, oil and gas can easily migrate along the faults into the reservoirs Gather into Tibet. like figure 2 Both the fault F1 and the fau...
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The invention provides an evaluation method for fracture reservoir control. According to the method, the oil source problem of a research area is fully considered through the relative positions of fractures in the main reservoir forming period and hydrocarbon source rock strata and the structural parts of fractures in the main reservoir forming period. Secondly, when the fracture control capability is evaluated, fractures of the whole research area are considered in a unified mode, fractures of an explored area and a new explored area are not considered separately any more, a large amount of statistics does not need to be conducted on explored area data, evaluation can be rapidly completed through semi-quantitative analysis, and the method is not limited by a small amount of new area data.The method is wide in application range and is not limited by basin types, the problem that different formulas of statistical parameters of different types of basins in the prior art are not suitableis solved, and the method can be suitable for basins with low exploration degree.
Description
technical field [0001] The invention belongs to the field of petroleum geology, in particular to an evaluation method for faults controlling reservoirs. Background technique [0002] The control of faults on oil and gas reservoirs is a very common phenomenon in oil and gas basins. Many scholars have studied this mechanism, the most famous of which is the "seismic pump" model, which believes that earthquakes act like pumps, pumping out deeper hydrothermal fluids. , migrated to the lower normal stress tensile fractures through the fault zone, and pointed out that the seismic pumping effect is beneficial to the migration and accumulation of oil and gas in the tectonic active area. However, there are many faults in a petroleum-bearing basin, and not all faults control the spatial distribution of oil and gas reservoirs. Which faults are more likely to contain oil and gas is a matter of great concern to oil and gas exploration. So far, there are two evaluation methods for faults ...
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Login to View More IPC IPC(8): G01V1/30
CPCG01V1/30G01V1/301
Inventor 李京昌李慧莉李建交
Owner CHINA PETROLEUM & CHEM CORP