|本期目录/Table of Contents|

[1]熊万林 朱俊章 杨兴业 龙祖烈 翟普强 郑仰帝 秦成岗.恩平凹陷北部隆起构造带油气成因来源及成藏过程研究[J].中国海上油气,2020,32(01):54-65.[doi:10.11935/j.issn.1673-1506.2020.01.006]
 XIONG Wanlin ZHU Junzhang YANG Xingye LONG Zulie ZHAI Puqiang ZHENG Yangdi QIN Chenggang.Study on the genetic sources and accumulation processes of oil and gas in the north uplift structural belt of Enping sag[J].China Offshore Oil and Gas,2020,32(01):54-65.[doi:10.11935/j.issn.1673-1506.2020.01.006]
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恩平凹陷北部隆起构造带油气成因来源及成藏过程研究()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第32卷
期数:
2020年01期
页码:
54-65
栏目:
油气勘探
出版日期:
2020-01-15

文章信息/Info

Title:
Study on the genetic sources and accumulation processes of oil and gas in the north uplift structural belt of Enping sag
文章编号:
1673-1506(2020)01-0054-12
作者:
熊万林 朱俊章 杨兴业 龙祖烈 翟普强 郑仰帝 秦成岗
(中海石油(中国)有限公司深圳分公司 广东深圳 518054)
Author(s):
XIONG Wanlin ZHU Junzhang YANG Xingye LONG Zulie ZHAI Puqiang ZHENG Yangdi QIN Chenggang
(CNOOC China Limited, Shenzhen Branch, Shenzhen, Guangdong 518054, China)
关键词:
恩平凹陷 北部隆起构造带 油气成因来源 油气成藏过程
Keywords:
Enping sag northern uplift tectonic zone oil and gas genetic sources hydrocarbon accumulation process
分类号:
TE122.1
DOI:
10.11935/j.issn.1673-1506.2020.01.006
文献标志码:
A
摘要:
恩平凹陷北部隆起构造带油气资源丰富,类型众多,但各构造贫富差距较大,区域成藏认识不明。通过对区内油、气、岩样品生物标志化合物、同位素、流体包裹体发育特征进行系统研究,认为研究区所发现的原油可划分为4种类型,主要来源于恩平17洼文昌组半深—深湖和浅湖—半深湖相两类优质烃源岩,烃类气体为混合有机质生成的原油伴生气,CO2气体主要为幔源无机成因气。研究区油气充注表现为“两期油、两期CO2、一期烃类气”充注特征,两期原油充注时间分别为13.8~7.7 Ma和4.9~0 Ma,且早期原油充注比率沿运移方向逐渐增加,两期CO2充注时间分别为11.6~6.1 Ma和0.3~0 Ma,一期烃类气充注时间为4.9~0 Ma,其中第一期CO2对第一期原油形成的油藏驱替作用明显; 研究区油气成藏过程表现为“南北洼双源供烃、两期油充注、断脊联控、CO2驱替、烃类气改造油藏”的特征。本文研究成果可为研究区未来油气勘探提供成藏过程定量研究的参考依据。
Abstract:
The northern uplift structural belt in the Enping sag is abundant in the resources and types of oil and gas, but there is a large gap between the richness and leanness of hydrocarbon in each structure, and less understanding is obtained in the regional accumulation. According to the systematic study on the development characteristics of biomarker compounds, isotopes, and fluid inclusions in oil, gas, and rock samples of the area, it is believed that the crude oil found in this study area can be divided into four types, mainly derived from two types of high-quality source rocks, namely the Wenchang Formation semi deep-deep lake facies and the shallow lake-semi-deep lake facies source rocks in Enping 17 subsag. The hydrocarbon gas is a crude gas associated gas generated by mixed organic matters, and the CO2 gas is mainly a mantle-sourced inorganic genesis gas. The oil and gas charge in the study area is characterized by the filling characteristics of “two-stage oil, two-stage CO2, and one-stage hydrocarbon gas”. The two-stage crude oil filling periods are 13.8~7.7 Ma and 4.9~0 Ma, respectively, and the early crude oil filling ratio increases along the migration direction; the two-stage CO2 filling periods are 11.6~6.1 Ma and 0.3~0 Ma, respectively; the one-stage hydrocarbon gases filling period is 4.9~0 Ma. Among them, the first stage of CO2 exerted a significant displacement to the reservoirs formed by the first stage of crude oil. The processes of oil and gas accumulation in the study area can be characterized by “dual-source hydrocarbon supply in the north-south subsags, two-stage oil charge, joint control of fault and ridge, CO2 displacement, and hydrocarbon gases reformation”. The research results of this paper can provide references for the quantitative research of reservoir-forming process in this study area, and guide the oil and gas exploration in the future.

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相似文献/References:

备注/Memo

备注/Memo:
*“十三五”国家科技重大专项“南海东部海域勘探新领域及关键技术(编号:2016ZX05024-004)”部分研究成果。 第一作者简介: 熊万林,男,工程师,2013年获中国地质大学硕士学位,主要从事油气成藏地球化学及含烃流体地质学研究工作。地址:广东省深圳市南山区后海滨路中海油大厦A1712(邮编:518054)。E-mail:xiongwl@cnooc.com.cn。收稿日期:2019-02-24 改回日期:2019-08-29
更新日期/Last Update: 2020-01-15