Clastic rock trap oil-gas possibility evaluation method based on risk probability

Abstract

The invention discloses a clastic rock trap oil-gas possibility evaluation method based on a risk probability. The method comprises the following steps: analyzing possible factors affecting a trap oil-gas possibility, wherein possible factors include trap conditions, hydrocarbon sources and charging conditions, reservoir conditions and storage conditions; analyzing continental facies clastic rockdrilling success and defeat traps according to four aspects of the trap conditions, the hydrocarbon source and the charging conditions, the reservoir conditions and the storage conditions, dissectinga gas reservoir, and determining a risk evaluation assignment standard of each possible factor; based on the actual parameters of an oil and gas drilling target, assigning each possible factor according to the risk evaluation assignment standard obtained in the step 2; and calculating an oil and gas containing probability of the oil and gas drilling target, wherein the oil and gas containing probability p is equal to p1*p2*p3*p4, p is the oil and gas containing probability, p1 is the value of the trap conditions, p2 is the value of the hydrocarbon sources and the charging conditions, p3 is thevalue of the reservoir conditions, and p4 is the value of the storage conditions.

Description

Technical field[0001]The present invention relates to a loop-containing oil-gas assessment method, and in particular, to a rocky rock ring closing an oil and gas assessment method based on a risk probability.Background technique[0002]Suitable for oil and gas aggregation, a place where oil gas reservoir is called a circle. The loop containing oil and gas is a complementary condition that is accompanied by a circle to the oil and gas accumulation system. It is the accuracy of the accuracy of the data used in the process of the loop recognition process, the accuracy of the seismic explanation and other technical methods and the identified circle All geological factors such as hydrocarbon sources, reservoirs, storage, coach and time-air matching of geological environments are commonly decided. The loop containing oil gas assessment is the geological discrimination or assignment of the above conditions. Using different methods to determine the possibility of oil and gas, the probability ...

AI Technical Summary

Problems solved by technology

However, this kind of method regards these factors as sufficient conditions rather than necessary conditions for trap oil and gas, and performs weight assignment calculations on them, ignoring the short board effect of wooden barrels, resulting in large deviations in evaluation results, which cannot be true, effective and accurate The evaluation of the oil and gas of traps affects the success rate of oil and gas drilling targets, resulting in a low success rate of pre-exploration wells

Images