Prediction method of tight sandstone reservoir pressure

A technology of tight sandstone reservoirs and prediction methods, applied in the field of pressure prediction of tight sandstone reservoirs, can solve problems such as pressure errors of tight sandstone reservoirs

Inactive Publication Date: 2019-06-25
SOUTHWEST PETROLEUM UNIV
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However, although there are many methods and models for formation pressure prediction in the prior art, due to the geological comp

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  • Prediction method of tight sandstone reservoir pressure
  • Prediction method of tight sandstone reservoir pressure
  • Prediction method of tight sandstone reservoir pressure

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[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not indicated in the implementation modes or examples, proceed according to conventional conditions or conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

[0023] The method for predicting the tight sandstone reservoir pressure involved in the embodiment of the present invention will be described in detail below.

[0024] Some embodiments of the present invention provide a method for predicting the pressure of tight sandstone reservoirs, which includes: comprehensively comparing the sonic transit time logging curve, resistivity logging curve, density logging curve and ...

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Abstract

The invention relates to a prediction method of tight sandstone reservoir pressure. The prediction method comprises the following steps: comprehensively comparing an interval transit time well log, aresistivity well log, a density well log and a compensated neutron well log of a single well, and according to the synchronous change trend segment of the interval transit time well log, the resistivity well log, the density well log and the compensated neutron well log, determining the normal compaction segment of a stratum; using the interval transit time well logs corresponding to the normal compaction segments of multiple wells in the same region to establish a comprehensive normal compaction trend line equation; and obtaining an equivalent depth He according to the comprehensive normal compaction trend line equation, and then substituting into a calculation formula of an equivalent depth method to obtain the stratum pressure of a target point. By comprehensively comparing the synchronous change trend of the well logs, the normal compaction segment with high reliability can be determined. The comprehensive normal compaction trend line equation established based on the method has higher credibility and persuasion, thereby greatly reducing the error of predicting the stratum pressure by using the equivalent depth method.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method for predicting the pressure of tight sandstone reservoirs. Background technique [0002] As global oil and gas exploration advances towards unconventional oil and gas resources, more and more tight sandstone reservoirs have been discovered. They are all abnormally high-pressure oil and gas reservoirs, which to a certain extent increase the difficulty of mining such oil and gas reservoirs. Therefore, finding a suitable pressure prediction method has important guiding significance for the safe and efficient development of such oil and gas reservoirs. However, although there are many methods and models for formation pressure prediction in the prior art, due to the geological complexity of tight sandstone reservoirs, the prediction of tight sandstone reservoir pressure has the problem of large errors. Therefore, there is an urgent need for an accurate prediction metho...

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Application Information

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IPC IPC(8): E21B49/00
Inventor 熊健刘向君梁利喜朱洪林
Owner SOUTHWEST PETROLEUM UNIV
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