Hydrocarbon Accumulation And Favorable Targets Prediction Of Shaqimiao Formation, Zhongjiang Field Of West Sichuang

Zhongjiang structure lies in the eastern slope of central West Sichuan Depression,and east of Hexinchang-Shiquanchang north-south structural belt. Huanglu syncline islocated at the north of the formation, which closes to the Zhongxinchang syncline inthe south. In the east, there is the Huilong nose-like oil and gas structure, which isperpendicular to the axis. By August2011, Southwest Branch of Sinopec had drilled17wells in the Zhongjiang are, but overall drilling success rate was low, and the oiland gas exploration had been in the downturn. Through analysis, the accumulationmodel and qualified zone prediction technology which cause the negative situation ofthe exploration. Therefore, Zhongjiang Shaximiao formation accumulation model andqualified zone for development of prediction research in this area is crucial andnecessary.This thesis is studying the sedimentary facies and qualified microfacies distribution ofZhongjiang Shaximiao formation with previous research results and all kinds of data,and summarizing its sedimentary, reservoir features and accumulation pattern,controlling factors, reservoir characteristics, physical characteristics. We analyseaccumulation conditions and the key factors，which control the Shaximiao gasreservoir on the basis of the above Using the accumulation pattern further explainthe differences between north and south of Zhongjiang Shaximiao gas reservoir. Thelogging standardization and explain technique are established gas response parametercharacteristic charts of Zhongjiang Shaximiao formation reservoir, and in order to rejudge each well. Based on the seismic analysis, processing and inversion technology,combined with logging technology, we set a standard on reservoir general predictionof zhongjiang area, analyse favorable facies belt and accumulation pattern, predict thequalified zone by using the reservoir prediction comprehensive evaluation standard.Thesis has the following innovative development:1. Establishing Zhongjing Shaximiao formation gas reservoir delta plain-deltafront and offshore lake facies deposition pattern. Explaining microfiacies distributionof Shaximiao formation and controlling factors.2. Summarizing the accumulation model-early no-fault accumulation model andlater fault accumulation model and main controlling factors. Using accumulationmodel and main controlling factors interpret the differences between the north andsouth of Shaximiao gas reservoir.3. Establishing gas response characteristic parameters and reservoir predictioncomprehensive evaluation standard. Forming gas filled prediction technology.Completing general evaluation of Zhongjiang Shaximiao gas reservoir.