摘要
致密油气为库车坳陷北部构造带迪北段重要勘探领域,但整体勘探程度较低。为了研究迪北段致密油气来源,落实勘探潜力,在不同层系烃源岩地球化学特征分析基础上,通过油气源对比指出下侏罗统阿合组致密储层内油气均以上三叠统烃源岩贡献为主。利用阿合组烃类流体包裹体均一温度测试结果和单井热史、埋藏史的分析,确定阿合组油气具有3期充注特征,结合迪北段油气成藏过程动态演化分析,认为迪北段油气具有早油晚气的特点,进而建立早期和晚期油气成藏模式,明确烃源岩有效排气强度和致密储层裂缝发育程度共同控制致密气藏的分布,并预测阿合组致密气藏勘探有利区位于迪北边缘。
Tight oil and gas is an important exploration field in the Dibei section of the structural belt of northern Kuqa depression,but the overall exploration degree is low.In order to investigate the source of tight oil and gas in the Dibei section and ascertain its exploration potential,oil/gas-source correction was carried out after geochemical characteristics of hydrocarbon source rocks in different series of strata were analyzed.It is shown that the oil and gas in the tight reservoirs of Ahe Formation of Lower Jurassic is mainly contributed by the Triassic source rocks.Then,based on the test results of homogeneous temperature of hydrocarbon fluid inclusion in the Ahe Formation and the analysis results of single well thermal history and burial history,it is determined that there are hydrocarbon charging characteristics of three periods in the Ahe Formation.Combined with the dynamic evolution analysis on the hydrocarbon accumulation process in the Dibei section,it is shown that the hydrocarbon in the Dibei section has the characteristics of early oil and late gas.Finally,the early and late hydrocarbon accumulation models were established.It is ascertained that the distribution of tight gas reservoirs is under the joint control of the effective expulsion intensity of source rocks and the fracture development degree of tight reservoirs.What’s more,it is predicted that the favorable exploration area of tight gas reservoirs in Ahe Formation is located along the northern margin of Dibei.
作者
李谨
王超
李剑
马卫
张海祖
卢玉红
李德江
刘满仓
Li Jin;Wang Chao;Li Jian;Ma Wei;Zhang Haizu;Lu Yuhong;Li Dejiang;Liu Mancang(PetroChina Research Institute of Petroleum Exploration&Development;CNPC Key Laboratory for Hydrocarbon Accumulation and Development of Natural Gas;Guangdong University of Petrochemical Technology;Guangdong Unconventional Energy Engineering and Technology Research Center;PetroChina Tarim Oilfield Company)
出处
《中国石油勘探》
CAS
CSCD
北大核心
2019年第4期485-497,共13页
China Petroleum Exploration
基金
国家科技重大专项“大型气田成藏机制、富集规律与勘探新领域”(2016ZX05007-003)
国家自然科学基金“断层岩古泥质含量恢复及古侧向封闭能力定量评价”(41802138)
中国科学院战略性先导科技专项(A类)“智能导钻技术装备体系与相关理论研究”项目“典型深层气藏成藏主控因素与勘探新领域”(XDA14010403)
广东石油化工学院科研启动基金“油气成藏期断层侧向运聚油气有利部位定量评价”(2018rc04)
关键词
库车坳陷
油气源对比
成藏期次
成藏模式
有利勘探区
Kuqa depression
oil/gas-source correlation
hydrocarbon accumulation period
hydrocarbon accumulation model
favorable exploration area
