泌阳凹陷核桃园组优质烃源岩发育古环境特征及地质意义  

Paleo-environmental Characteristics of the Development of High-quality Hydrocarbon Source Rocks in Hetaoyuan Formation of Biyang Sag and Geological Significance

作　　者：石正勇[1] 金芸芸[1] 罗家群[1] Shi Zhengyong;Jin Yunyun;Luo Jiaqun(Sinopec Henan Oilfield Company,Nanyang,Henan 473132,China)

机构地区：[1]中国石化河南油田分公司,河南南阳473132

出　　处：《特种油气藏》2021年第1期51-58,共8页Special Oil & Gas Reservoirs

基　　金：中国石化重大专项“东部探区油气聚集规律与精细评价关键技术”子课题“泌阳凹陷油气聚集规律与精细评价关键技术”(ZDP17012)。

摘　　要：针对泌阳凹陷优质烃源岩生烃条件及其发育环境不明确的问题,运用多种地质、地球化学分析方法,精细刻画了主力烃源岩的发育规模,明确了研究区优质烃源岩的发育环境,为下步油气勘探提供重要依据。根据生烃条件评价结果和资源贡献,分析厘定核桃园组H _(3)^(4)-H_(3)^(2)亚段为优质烃源岩发育段;古环境研究揭示核桃园组烃源岩沉积环境自下而上水体逐渐变咸,H_(3)上—H_(2)段主咸化期对应的有机质丰度也相对较高。综合分析认为环凹带烃源岩条件好,剩余资源量大,是下步勘探的有利地区,该研究进一步明确了优质烃源岩的发育环境,可为下步油气盆地勘探提供依据。To solve the problem of unclear hydrocarbon generation conditions and development environment of high-quality hydrocarbon source rocks in Biyang Sag,a variety of geological and geochemical analysis methods were used to describe the development scale of the main hydrocarbon source rocks and define the development environment of high-quality hydrocarbon source rocks in the research area,which provides important basis for further oil and gas exploration.According to the hydrocarbon generation conditions and resource contribution analysis,we proposed the Section H _(3)^(4)-H_(3)^(2) of Hetaoyuan Formation is a high-quality hydrocarbon source rock development section,and the research on paleo-environmental shows that the water gradually become salty from bottom to top in the hydrocarbon source rock sedimentary environment of Hetaoyuan Formation,and the abundance of organic matters in main salting period of Section H_(3) upper-H_(2) is also relatively high.In conclusion,the comprehensive analysis shows that the annular concave belt is a favorable area for further exploration because of its good hydrocarbon source rock conditions and large amount of remaining resources,This study further clarified the development environment of high-quality source rocks,and provided the basis for further exploration of oil and gas basins.

关 键 词：地球化学特征 优质烃源岩 咸化环境 微量元素 泌阳凹陷 核桃园组 

分 类 号：TE122.1[石油与天然气工程—油气勘探]