本文選題：川東地區(qū) + 龍王廟組��； 參考：《地質(zhì)科技情報》2017年06期

【摘要】：以川東地區(qū)龍王廟組顆粒灘為研究對象,在綜合野外剖面、鉆井、測錄井、巖心和薄片等資料的基礎(chǔ)上,對區(qū)內(nèi)龍王廟組顆粒灘特征、分布規(guī)律和主控因素進行了研究。研究區(qū)顆粒灘巖石類型包括顆粒白云巖和顆�；�?guī)r,顆粒類型以砂屑為主,其次為鮞粒和礫屑。顆粒灘主要發(fā)育瀉湖-顆粒灘、瀉湖-顆粒灘-臺坪、灘間海-顆粒灘3種向上變淺、粒度變粗的沉積序列。單個沉積序列中的顆粒灘厚度一般小于2m,縱向上具有良好的繼承性,表現(xiàn)為多個單旋回薄單體的疊置;橫向上,顆粒灘規(guī)模小,連續(xù)性較差,具有灘核向灘緣快速尖滅的特征;平面上,顆粒灘主要分布在古地貌高地核部和翼部,總體上呈點狀沿北東向展布,平面連續(xù)性差。顆粒灘分布的主控因素為海平面升降變化和古地貌,海平面升降變化控制了顆粒灘的發(fā)育特征和疊置樣式,古地貌決定了顆粒灘的橫向連續(xù)性和平面分布特征。對比研究表明,圍繞瀉湖等臺內(nèi)較大型洼地周圍發(fā)育的古地貌高地為川東地區(qū)龍王廟組顆粒灘相儲層發(fā)育有利區(qū),縱向上主要分布于龍王廟組下段的上部與上段的中上部。
[Abstract]:Based on the data of field profile, drilling, logging, core and thin slice, the characteristics, distribution and main controlling factors of granular beach of Longwangmiao formation in East Sichuan are studied. The rock types of granular beach in the study area include granular dolomite and granular limestone. The grain types are mainly sand debris followed by oolitic grain and gravel. There are three types of sedimentary sequences: lagoon-granular beach, lagoon-granular beach-platform flat, inter-beach sea-granular beach, which are shallower up and coarser in grain size. The thickness of granular beach in a single sedimentary sequence is generally less than 2 m, and it has good inheritance in longitudinal direction, which is characterized by superposition of several single cycle thin monomers, small scale and poor continuity of grain beach in transverse direction, which is characterized by rapid pinching of the beach core to the edge of the beach. On the plane, the granular beach is mainly distributed in the core and wing of paleogeomorphic highland. The main controlling factors of granular beach distribution are sea-level fluctuation and paleogeomorphology, which control the development and superposition pattern of granular beach. Paleogeomorphology determines the horizontal continuity and plane distribution of granular beach. The comparative study shows that the paleogeomorphic highlands developed around the relatively large depressions in the lagoon are favorable areas for the development of granular beach facies reservoirs in Longwangmiao formation in eastern Sichuan, and are mainly distributed in the upper and middle parts of the lower and upper sections of the Longwangmiao formation vertically.
【作者單位】： 中國石油化工股份有限公司勘探分公司研究院;西南石油大學(xué)地球科學(xué)與技術(shù)學(xué)院;
【基金】：中國石化科技部項目“四川盆地下組合油氣富集規(guī)律與目標(biāo)評價”(P16083)
【分類號】：P618.13

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