Method for determining abrupt slope sand body type convergence ridge oil and gas reserves

Abstract

The invention discloses a method for determining abrupt slope sand body type convergence ridge oil and gas reserves. The method comprises the following steps: determining the influence factors of the abrupt slope sand body type convergence ridge oil and gas reserves, wherein the influence factors comprise the convergence ridge sand body area, the hydrocarbon source rock hydrocarbon generation intensity, the convergence ridge amplitude, the convergence ridge porosity and the convergence ridge thickness; carrying out modeling on the determined five influence factors according to a weighting mode, and establishing a comprehensive prediction model of the five influence factors; simulating the established model, determining oil and gas reserves of steep slope sand body type convergence ridge, wherein the specific path is as follows: substituting five factors of the steep slope sand body type convergence ridge into a comprehensive prediction formula B = a (a1S3 + a2S2 + a3S1 + a4) + b (b1T3 + b2T2 + b3T + b4) + c (c1 theta 3 + c2 theta 2 + c3 theta + c4) + d (d1 phi 3 + d2 phi 2 + d3 phi + d4) + e (e1H3 + e2H2 + e3H + e4) established in the second step, and solving a value B, namely the determined oil and gas reserve of the steep slope sand body type convergence ridge. By means of the method, the deep abrupt slope sand body type convergence ridge oil and gas reserves can be effectively determined, the defect of few drilling data is overcome, and the experiment workload is reduced.

Description

Technical field: [0001] The invention relates to the technical field of oil and gas exploration tests, in particular to a method for simulating and predicting the oil and gas reserves of deep steep slope sand body type converging ridges, which is used to predict the oil and gas reserves of deep steep slope sand body type converging ridges and to study deep steep slope sand body converging ridges Corresponding to the law of shallow oil and gas enrichment and accumulation. Background technique: [0002] The hydrocarbon generation threshold refers to the minimum temperature (depth) required for the kerogen in source rocks to generate a large amount of hydrocarbons. Affected by the geothermal gradient, the burial depth increases and the ground temperature rises. Therefore, only when the burial depth reaches a greater depth and the ground temperature reaches the hydrocarbon generation threshold, oil and gas will start to generate in large quantities, which results in the phenomen...

AI Technical Summary

Problems solved by technology

Steep slope sand body convergence ridge is an important way of hydrocarbon accumulation under the coupling of oil and gas depth. At present, there is no research on the influencing factors of deep steep slope sand body type convergence ridge in the public literature, and there is a lack of reasonable and high-fitting models for predicting oil and gas reserves.

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