Development and cycle control of strike-slip transition zone in Liaobei area of Bohai Sea
-
摘要:
基于渤海辽北地区钻井资料和三维地震资料精细解释，对走滑断裂发育特征开展精细研究，并进一步完成对走滑转换构造的宏观判识和精细刻画，总结走滑转换构造对圈闭样式的差异控制作用。研究结果表明：①辽北地区断裂体系整体表现出强烈的右旋走滑性质，在走滑断裂叠接带、弯曲、尾端等构造位置，因构造应力调整而发育大量走滑转换构造；②依据走滑转换带的力学性质划分为增压型和释压型2大类，每一大类依据断裂空间展布关系进一步细化为单支弯曲型和双支叠复型，其中，单支弯曲型表现为单条走滑断层平面呈现“S”型变形，双支叠复型则表现为右旋左阶或右旋右阶；③增压型和释压型走滑转换构造控制发育的圈闭类型分别以断背斜和断块构造圈闭为主，增压型走滑转换构造控制的圈闭相对于释压型具有更大的勘探潜力。该研究丰富了走滑转换构造体系，填补了辽北地区走滑转换构造研究的空白，对渤海海域郯庐走滑断裂带油气勘探具有一定的借鉴指导意义。
Abstract:Combined with previous research results based on three-dimensional seismic data and drilling data, the development characteristics of strike-slip faults in the northern Liaoning, NE China, was analyzed in detail, the macro identification and fine characterization of strike-slip transition zone were completed, and the role of strike-slip transition zone in controlling the development circling was summarized. Results show that the Dongying fault system as a whole shows clear dextral strike-slip properties. Three NE-trending strike slip faults are developed, and the fault assemblages present typical strike-slip structural styles, such as feather, echelon, horsetail, and flower. In terms of mechanical properties of strike-slip transition zone, they were divided into two categories: pressurization type and depressurization, and each could be subdivided into two sub-categories according to the spatial distribution relationship of faults: single-branch bending type and dual-branch superposition type. The first type shows that the plane of single strike-slip fault presents "S" type deformation, and the second type shows dextral right-stepped arrangement or dextral left-stepped arrangement. The pressurized and depressurized strike-slip transition zones controlled the development of fault anticline trap and fault block structural trap, respectively; and the former trap has greater exploration potential than the latter. This study enriched the structural system of strike-slip transition zone, filled the gap in the study of strike-slip transition zone in the northern Liaoning, and shall be able to guide the oil and gas exploration in the Tanlu strike-lip fault zone in the Bohai Sea region.
-
Key words:
- Bohai Sea area /
- Tanlu fault zone /
- Liaobei area /
- strike-slip fault /
- strike-slip transition zone /
- trap
-
-
[1] DAHLSTROM C D A. Structural geology in the eastern margin of the Canadian Rocky Mountains[J]. Bulletin of Canadian Petroleum Geology,1970,18(3):332-406.
[2] 叶洪. 断块构造理论在研究走滑转换构造中的应用[M]. 北京: 科学出版社, 1988: 22-31.
[3] MORLEY C K,NELSON R A,PATTON T L,et al. Transfer Zones in the East African rift system and their relevance to hydrocarbon exploration in rifts[J]. AAPG Bulletin,1990,74(8):1234-1253.
[4] WOODCOCK N H,FISCHER M. Strike-slip duplexes[J]. Journal of Structural Geology,1986,8(7):725-735. doi: 10.1016/0191-8141(86)90021-0
[5] 徐嘉炜. 论走滑断层作用的几个主要问题[J]. 地学前缘,1995,2(1/2):125-136. doi: 10.3321/j.issn:1005-2321.1995.02.015
[6] 陈发景. 调节带(或传递带)的基本概念和分类[J]. 现代地质,2003,17(2):186. doi: 10.3969/j.issn.1000-8527.2003.02.018
[7] 李伟,蒙美芳,陈兴鹏,等. 渤海海域东部弯曲走滑断裂派生伸展与挤压作用的定量表征及其油气地质意义[J]. 中国石油大学学报(自然科学版),2021,45(5):23-32.
[8] LI W,JIA H B,WU Z P,et al. Controls of strike-slip faults on geomorphology and sediment dispersal in the Paleogene Bohai Bay area:from a source to sink perspective[J]. Marine and Petroleum Geology,2021(126):1-14.
[9] 龚再升, 蔡东升, 张功成. 郯庐断裂对渤海海域东部油气成藏的控制作用. 石油学报, 2007, 28（4）: 1-10.
[10] 李伟,平明明,周东红,等. 辽东湾坳陷新生代主干断裂走滑量的估算及其地质意义[J]. 大地构造与成矿学,2018,42(3):445-454.
[11] 漆家福. 裂陷盆地中的构造变换带及其石油地质意义[J]. 海相油气地质,2007,12(4):43-50. doi: 10.3969/j.issn.1672-9854.2007.04.007
[12] 徐长贵. 渤海走滑转换带及其对大中型油气田形成的控制作用[J]. 地球科学,2016,41(9):1548-1560.
[13] 张江涛,郭涛,王冰洁,等. 渤海辽北地区新生代断裂特征及其演变过程[J]. 现代地质,2020,34(6):1110-1118.
[14] 周心怀,余一欣,魏刚,等. 渤海辽东湾海域JZ25-1S转换带与油气成藏的关系[J]. 石油学报,2008,24(5):698-704.
[15] 张江涛,吴奎,王冰洁,等. 渤海海域辽西凸起北段新生代构造演化的磷灰石裂变径迹证据[J]. 石油学报,2018,39(11):1262-1271. doi: 10.7623/syxb201811006
[16] 徐长贵,余一欣,吴奎,等. 辽东湾坳陷断裂联接及其控油气作用[J]. 石油与天然气地质,2014,35(4):456-462. doi: 10.11743/ogg20140403
[17] 张江涛,吴奎,黄晓波,等. 辽西凹陷北洼新生代断裂特征及控藏作用[J]. 中国海上油气,2017,29(5):39-47.
[18] 张林,吴智平,李伟,等. 济阳均陷伸展背景下的变换构造研究[J]. 大地构造与成矿学,2012,36(1):24-31. doi: 10.3969/j.issn.1001-1552.2012.01.004
[19] 牛成民,杨海风,郭涛,等. 郯庐断裂带辽东湾段变形特征及展布规律[J]. 石油与天然气地质,2022,43(2):265-276. doi: 10.11743/ogg20220202
[20] 杨海风,吕丁友,孙永河,等. 渤海湾盆地黄河口凹陷东洼断裂体系发育特征及其变形过程的构造物理模拟[J]. 地球科学,2021,46(7):2391-2402.
-
下载:
图(9)
计量
- 文章访问数: 458
- PDF下载数: 32
- 施引文献: 0