南华北盆地尉参1井上古生界海陆交互相页岩地球化学及其含气特征
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摘要
为了明确南华北盆地太康隆起上古生界海陆交互相页岩含气性特征及资源潜力,以太康隆起西部页岩气参数井尉参1井的钻录井、岩心和测试分析等资料为基础,对泥页岩的发育特征、地球化学特征及含气性进行了研究。结果表明:太康隆起上古生界海陆交互相泥页岩较发育,累计厚度大;泥页岩有机碳含量高,二叠系太原组和山西组TOC平均值分别为1.46%、 1.01%;泥页岩有机质类型均为Ⅲ型,现场解吸气含量分别为0.172～5.478 m3/t和0.242～2.858 m3/t。并进一步探讨了埋藏深度、岩性特征及地球化学特征与含气性之间的关系,优选了优质烃源岩发育层段。
In order to determine the gas-bearing property and shale-gas resource potential of paralic transitional stratum of the Upper Paleozoic in Taikang Uplift, Southern North China Basin, the characteristics of the shale development,geochemistry and hydrocarbon content are studied based on the data of drilling, logging and test results of well Weican 1.The results show that the paralic transitional shale of Upper Paleozoic develop with large accumulative thickness. The TOC value of Permian Taiyuan Formation and Shanxi Formation is high with average value of 1.46% and 1.01% respectively,and the organic matter is mainly of type Ⅲ. The result of field analysis of core shows that the gas content is 0.172 ～5.478 m3/t and 0.242～2.858 m3/t respectively in these two formations. The relationship is further discussed between the gasbearing property and such factors as burial depth, lithologic character and geochemical characteristics. The high quality source rocks are appointed out on the basis of comprehensive analysis.
In order to determine the gas-bearing property and shale-gas resource potential of paralic transitional stratum of the Upper Paleozoic in Taikang Uplift, Southern North China Basin, the characteristics of the shale development,geochemistry and hydrocarbon content are studied based on the data of drilling, logging and test results of well Weican 1.The results show that the paralic transitional shale of Upper Paleozoic develop with large accumulative thickness. The TOC value of Permian Taiyuan Formation and Shanxi Formation is high with average value of 1.46% and 1.01% respectively,and the organic matter is mainly of type Ⅲ. The result of field analysis of core shows that the gas content is 0.172 ～5.478 m3/t and 0.242～2.858 m3/t respectively in these two formations. The relationship is further discussed between the gasbearing property and such factors as burial depth, lithologic character and geochemical characteristics. The high quality source rocks are appointed out on the basis of comprehensive analysis.
引文
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[4]胡明毅,邱小松,胡忠贵,等.页岩气储层研究现状及存在问题探讨[J].特种油气藏,2015,22(2):1-7.
[5]曾秋楠,于炳松,李昱霏.鄂尔多斯盆地东南部延长组页岩储层特征及控制因素[J].特种油气藏,2013,20(1):23-26.
[6]韩宇春,黄晓梅.华北南部地区古生界构造演化及其油气远景[J].海相油气地质,1997,2(3):11-15.
[7]林小云,蒋伟,陈倩岚.南华北地区二叠系烃源岩生烃潜力评价[J].石油天然气学报,2011,33(6):1-5.
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[9]邱庆伦,张木辰,李中明,等.牟页1井海陆过渡相页岩气压裂试气效果分析[J].石油地质与工程,2017,31(2):111-116.
[10]张交东,曾秋楠,周新桂,等.南华北盆地太康隆起西部新区上古生界天然气成藏条件与钻探发现[J].天然气地球科学,2017,28(11):1637-1649.
[11]胡国辉,赵太平,周艳艳,等.华北克拉通南缘中-新元古代沉积地层对比研究及其地质意义[J].岩石学报,2013,29(7):2491-2507.
[12]谢其锋,周立发,刘新华,等.南华北盆地周口坳陷南12井油藏成藏条件分析[J].石油地质与工程,2008,22(5):14-17.
[13]林玉祥,朱传真,赵承锦,等.华北地区晚三叠世岩相古地理特征[J].岩性油气藏,2016,28(5):82-90.
[14]杜建波,田景春,何明喜,等.南华北地区上古生界储层影响因素分析[J].成都理工大学学报(自然科学版),2012,39(5):496-501.
[15]何明喜,王敏,邱荣华,等.南华北多期复合叠合盆地与油气[M].北京:地质出版社,2012:256.
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