第37卷第4期 2016年8月
文章编号：1001-3873(2016)04-0391-10
新疆石油地质
XINJIANG PETROLEUM GEOLOGY DOI:10.7657/XJPG20160403
Vol. 37.No.4 Aug.2016
构造活动对冲积扇及其油气成藏的控制作用
-以准噶尔盆地西北缘二叠系一三叠系冲积扇为例
印森林，唐勇”，胡张明”，吴涛”，张磊”，张纪易！
（1.长江大学录井技术与工程研究院，湖北荆州434023；2.中国石油新疆油田分公司勘探开发研究院
新疆克拉玛依834000；3.中国石油集团西部钻探工程有限公司克拉玛依录井工程公司，新疆克拉玛依834000）要：构造活动与冲积扇砂砾岩体的耦合关系，是构遗沉积学研究的热点和难点。在准噶尔垒地西北缘，沿断裂带摘
发育了大面积冲积扇砂砾岩体油气藏，因此，研究断裂带构造活动对冲积扇发育及其油气成藏的控制作用，具有重要的理论和实践意义。利用岩心、测并及地震资料，开展了构造控制下冲积扇砂砾岩体展布特征研究；结合油气成藏资料开展了构造控制下冲积扇砂砾岩体油气成藏模式的研究。冲积扇叠置样式与同生断层的活动关系密切，同生断层控制下扇体具有3种典型的分布样式，即正梳状断层组合控制下形成的源退积式冲积扇、反梳状断层与交叉状断层控制下形成的侧向叠覆式冲积扇和垂向叠覆式冲积扇、前展式断层控制下形成的进积式冲积扇。构造活动对冲积扇形成过程中的物源、地形及气候影响明显。这些因素综合控制了不同构造位置冲积扇砂砾岩体的发育情况及其内部的沉积序列差异性。冲积扇砂砾岩油气截是构造和岩性综合作用形成的，具有一扇一蔗、一扇多藏和多扇一藏的成藏特点。
关键词：准需尔垒地；西北缘；构造活动；冲积扇；砂砾岩；同生断层；油气藏
中图分类号：TE112.2
文献标识码：A
Controls of Tectonic ActivityonAlluvialFanDeposits andHydrocarbonAccumulation: ACase
Study of Permian and Triassic Alluvial Fans in Northwestern Margin of Junggar Basin
YIN Senlin', TANG Yong", HU Zhangming", WU Tao", ZHANG Lei", ZHANG Jiyi
(1.School of Mud Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei 434023, China;
2.Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China; 3.Karamay Mud Logging Engineering Company, Xibu Drilling Engineering Company Limited, CNPC, Karamay, Xinjiang 834000, China) Abstract: The coupling relationship between tectonic activity and alluvial fan deposits is one of the hot spots and difficulties in tectono-sedimentology research. Uncommon and widespread sandy conglomerate bodies are developed along the faulted zone in the northwesterm margin of Junggar basin. Therefore, studies on the controls of tectonic activity on alluvial fans and hydrocarbon accumulation are of great theoretical and practical significance, Using the data of cores, logging and seismic profiles, this paper studies the distribution of structure-controlled alluvial-fan sandy conglomerate bodies, and the hydrocarbon accumulation patterms combined with related oil and gas accumula-tion data. It is shown that the stacking pattem of alluvial fans is closely related to the activity of contemporaneous faults, and there are 3 typ-e anaee oa oaan e o sed e source direction and controlled by normal comb-like fault combination, the laterally superimposed alluvial fans and vertically stacking allu-vial fans controlled by reverse comb-like faults and crossing faults, and the progradational alluvial fans controlled by preceding faults. Tec-tonic activity has significant impact on provenance, landform and local climate during the formation of these alluvial fans. These factors jointly control the development and sedimentary sequence differences of alluvialfan sandy conglomerate bodies at different positions of the structures, It is concluded that alluvialfan sandy conglomerate reservoir forms under the effects of both structure and lithology, which is characterized by one reservoir in one fan, several reservoirs in one fan, and one reservoir in several fans.
Keywords: Junggar basin; northwestern margin; tectonic activity; alluvial fan; sandy conglomerate; contemporaneous fault; petroleum reservoir
发育于盆山耦合处的冲积扇与构造活动关系密切，盆山耦合处冲积扇砂砾岩体的研究因此而受到了沉积学家、地貌学家及石油地质学家的广泛关注"-"。研究发现，冲积扇砂砾岩体具有构造“指相性”，一
收稿日期：2016-05-23
修订日期：2016-05-30
基金项目：国家自然科学基金（41502126;41372116）
方面，构造活动的差异会在冲积扇砂砾岩体垂向序列中体现出来-1围，反过来，冲积扇砂砾岩体的分布特点及其沉积序列也可以揭示构造活动的细节，构造活动强度是引起冲积扇发育及其建设的关键，与体规
作者简介：印森林（1983-），男，潮北仙桃人，副教授.博士，石油地质，（Tel)18696453978（E-mail)senlin66@yangtzeu.edu.cn 万方数据