Research On Reservoir Formation Condition In Yi 69 Well Of Yitong Basin

Yi 69 well area is located in the Yidan convex area of Yitong Basin, the main purpose of the well drilling is to explore the oil and gas in the high position of the structure of Yidan convex. The bedrock lithology in this area is complex, and the first discovery of carbonate rocks in the internal bedrock is of petroleum geological significance, so the research difficulty lies in the metamorphic period, the limestone hydrocarbon generation capacity and reservoir capacity.By collecting and analyzing geological drilling Yi 69 design, logging, seismic data, laboratory analysis, results of previous studies(reports, multimedia), scanning electron microscopy, samples and other information systems, Yi 69 wells in Iraq were the basis of geological conditions analysis, source rocks orientation and quantitative evaluation, reservoir evaluation, appraisal cap, systematically studied area, reservoir, cover, transport, rings(Paul) and other factors and their temporal accumulation matching relation, finally completed Research accumulation conditions in Yi 69 natural gas well area. The results showed that the developmental period of clastic double thickness, high abundance of good type, maturity, high-quality source rocks, to ensure that the double-Sec adequate gas supply conditions. Well clastic rocks in the overall physical properties for the middle- good level of growth in gas reservoir lithology split between the physical properties of the best river siltstones; and development of a large area of fan delta front sands provide favorable for hydrocarbon accumulation reservoir space. Three sections cover the physical properties of the double difference, closed well. Itami raised with good source rock conditions and seal condition, but poor reservoir conditions. Source rocks expulsion of a large number of students before the beginning of the formation of traps, traps for early Hydrocarbon source rocks gathered is invalid. By recognizing this study, reservoir, cover characteristics and temporal matching relation, Yi 69 wells summed gas accumulation conditions and controlling factors of the entire Chaluhe Fault got in the next step exploration deployment guide.