Method for analyzing geological risk of multilayer trap
A risk analysis and geological technology, applied in the field of geological evaluation of oil and gas field exploration, can solve the problems of reducing success, affecting the economic value of traps, and not considering the dependence conditions of probability success, so as to reduce the workload and improve the estimation success rate. The effect of removing bias in correlation assessments
Inactive Publication Date: 2018-12-07
恒泰艾普(北京)云技术有限公司
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Problems solved by technology
In geological risk analysis, there are many geologic correlation factors in multi-layer trap targets in oil and gas fields. At present, most companies basically use the simple average value of the probability of geological factors, without considering the success dependent conditions of the probability of each layer. The independent factor situation obviously greatly reduces the probability of success, thereby affecting the assessment of the economic value of the trap
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[0022] The present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Apparently, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] A geological risk analysis method for multi-layer traps, comprising the following steps:
[0024] (1) Input and management of probability values of geological conditions (geological factors);
[0025] (2) Reservoir correlation setting: set the correlation between reservoirs, and input the correlation between various geological conditions, and the correlation size is 0-1;
[0026] (3) Calculation of multi-layer risk probability values in the case of correlation and non-correlation res...
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The invention provides a method for analyzing the geological risk of a multilayer trap, comprising the following steps: setting the correlation among reservoirs, and inputting the correlation among geological conditions; calculating the multilayer risk probability values under the conditions of correlation and no correlation respectively; calculating the probability value of the relevant production layer according to the formulas under the conditions of correlation and no correlation, and calculating the probability value of the production layer under the condition of no correlation; and drawing a result map. The level of success rate estimation by researchers is improved while the workload of geological risk assessment required by various enterprises and companies is reduced. Moreover, the method of geological success rate prediction is enriched, the correlation evaluation deviation of geological evaluation of multilayer traps is eliminated, and it is ensured that the geological analysis of exploration targets is not too optimistic or too conservative.
Description
technical field [0001] The invention belongs to the technical field of geological evaluation of oil and gas field exploration, and in particular relates to functional software for geological risk analysis. Background technique [0002] A trap consists of three parts: reservoir, caprock, and barriers that prevent oil and gas from continuing to migrate and cause oil and gas accumulation. It can be the bending deformation of the caprock itself, such as an anticline, or another barrier, such as a fault , lithological changes, etc. In short, the trap is an effective space to capture and disperse hydrocarbons to form oil and gas accumulation, and has the ability to store oil and gas, but there may not be oil and gas in the trap. Once a sufficient amount of oil and gas enters the trap, fills the trap or occupies a part of the trap, a hydrocarbon reservoir can be formed. The size and scale of the trap often determines the oil and gas reservoir The size of the reserve is measured ...
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IPC IPC(8): G06Q10/06
CPCG06Q10/0635
Inventor 王振宇殷峰
Owner 恒泰艾普(北京)云技术有限公司