鄂西渝东地区下寒武统石龙洞组成岩作用特征
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摘要
应用鄂西渝东地区利1井(或剖面)下寒武统石龙洞组301件碳酸盐岩薄片的观察资料,结合储层流体包裹体以及埋藏史、热史资料,对其成岩作用类型、成岩演化序列、储层孔隙演化进行了研究。结果显示:该区石龙洞组的主要成岩作用类型包括胶结、压实—压溶、白云石化、破裂、溶蚀等作用;浅埋藏阶段白云石化以及中—深埋藏阶段溶蚀是储层形成的关键性成岩作用;研究区石龙洞组沉积时期潟湖边缘浅滩、浅缓坡浅滩发育区域(龙山茨岩塘一带及其以西)将是储层发育有利区。
Applying the observation data of 301 carbonate rock thin slices in Well Li 1( or profiles) from Lower Cambrian Shilongdong Fm in the Western Hubei and Eastern Chongqing region,combining data of reservoir fluid inclusion,burial history and thermal history,its diagenesis types,diagenetic evolution series and reservoir porosity evolution were studied. The study results show that the major diagenesis types in Shilongdong Fm in this region include cementation,compaction- pressolution,dolomitization,cracking,dissolution etc.; Dolomitization during shallow burial stage and dissolution during middle- deep burial stage are the key diagenesis for forming reservoir beds; Shallow shoals at lagoon edges and shallow ramps( in Ciyantang town of Longshan county and its western region) formed during the deposit period of the Shilongdong Fm are the favorable areas for developing reservoir beds.
Applying the observation data of 301 carbonate rock thin slices in Well Li 1( or profiles) from Lower Cambrian Shilongdong Fm in the Western Hubei and Eastern Chongqing region,combining data of reservoir fluid inclusion,burial history and thermal history,its diagenesis types,diagenetic evolution series and reservoir porosity evolution were studied. The study results show that the major diagenesis types in Shilongdong Fm in this region include cementation,compaction- pressolution,dolomitization,cracking,dissolution etc.; Dolomitization during shallow burial stage and dissolution during middle- deep burial stage are the key diagenesis for forming reservoir beds; Shallow shoals at lagoon edges and shallow ramps( in Ciyantang town of Longshan county and its western region) formed during the deposit period of the Shilongdong Fm are the favorable areas for developing reservoir beds.
引文
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[2]郭战峰,刘新民,盛贤才,等.东秦岭—大别造山带南侧加里东期古隆起特征及油气地质意义[J].石油实验地质,2009,31(2):181-185.
[3]夏小进,胡小娟,等.赣西北下寒武统页岩气成藏条件及资源潜力[J].特种油气藏,2013,20(6):35-39.
[4]郭战峰,等.鄂西渝东地区震旦、寒武系天然气成藏条件[J].西南石油大学学报,2008,30(4):39-42.
[5]王必金,等.湘鄂西区寒武系层序划分及其对油气勘探的意义[J].石油实验地质,2013,35(4):372-377.
[6]李旭兵,刘安,曾雄伟,等.雪峰山西侧地区寒武系娄山关组碳酸盐岩储层特征研究[J].石油实验地质,2012,34(2):153-157.
[7]黄亮.川东南坳陷带清虚洞组优质储层发育主控因素分析[J].天然气地球科学,2012,23(3):508-513.
[8]刘建锋,彭军,等.川东南清虚洞组沉积特征及其对储层的控制[J].地学前缘,2012,19(4):239-246.
[9]王婵娟,卢双舫,黄文彪,等.裕民地区扶余油层成岩作用及次生孔隙发育区预测[J].大庆石油地质与开发,2012,31(3):24-29.
[10]朱光有,张水昌,梁英波,等.四川盆地天然气特征及气源[J].地学前缘,2006,13(2):234-248.
[11]罗厚勇,王万春,刘文汇.TSR模拟实验研究与地质实际的异同及可能原因分析[J].石油实验地质,2012,34(2):186-192.