ANALYSIS ON THE INVERSION STRUCTURES AND OIL-GAS CONDITIONS OF THE QIONGHAI SAG
-
摘要:
珠江口盆地珠Ⅲ拗陷已经发现了大量反转构造油气藏及含油构造，但拗陷北部的琼海凹陷反转构造带研究程度很低.运用生长指数法及位移-距离曲线法分析了琼海凹陷反转构造的反转时期及活动强度.利用沉积分析及定量模拟的手段评价了该区反转构造的烃源岩、储层、盖层条件.结果显示，琼海凹陷构造反转开始于中新世中期；反转构造带发育始新统烃源岩及渐新统-中新统储盖组合；反转时期与文昌组上部烃源岩主排烃期匹配，反转构造带是琼海凹陷有利的勘探方向.
Abstract:A large number of inversion oil-gas reservoirs and oil-bearing structures have been discovered in Z-3 Depression of Pearl River Mouth Basin, yet the research on the inversion structure belts in Qionghai Sag in the north of the Depression was in low level. The methods of growth index and displacement-distance curve are adopted to analyze the period and intensity of inversion structures. The source rocks, reservoirs and caprock conditions are evaluated through sedimentary analysis and quantitative simulation. The results show that the structural inversion started in the middle Miocene, with the Eocene source rocks and Oligocene-Miocene reservoir-caprock assemblages developed in the inverted structure belts. The inversion period is matched with the main expulsion stage of source rocks in the upper Wenchang Formation, thus it is concluded that the inversion structural belt is a favorable exploration direction for Qionghai Sag.
-
Key words:
- Qionghai Sag /
- inversion structure /
- kinematics /
- oil-gas reservoir
-
-
表 1 琼海西断层生长指数
Table 1. Growth index of west Qionghai fault
地质时期 地层 顶面反射层 GI 上新世 万山组(NWS) T05 - 中新世 晚 粵海组(NYH） T10 0.45 中 韩江组(NHJ） T20 0.03 早 珠江组上(NZJ) T40 0.12 珠江组下(NZJ) T50 0.19 渐新世 珠海组(NZH） T60 7.39 恩平组(NE） T70 - 始新世 文昌(Ew） T80 - 神狐组（Es） T90 - 古新世 
下载: 导出CSV
表 2 珠江口盆地文昌组烃源岩指标统计
Table 2. Source rock indexes of Wenchang Formation in Pearl River Mouth Basin
有机质丰度 有机质类型 TOC/% HI/10-3(质量分数 S1+S2/10-3(质量分数） (0.5-4.53)/2.21 (166-651)/462 (0.5-43.7)/87 Ⅰ1-Ⅰ11 n=38 n=52 n=75 n=47 数据表示：（最小值-最大值）/平均值；n为统计样品数量.
下载: 导出CSV
-
[1] Glennie K W, Boegner P L E. Sole pit inversion tectonics[C]//Petroleum Geology of the Continent al Shelf of North-West Europe. London: Institute of Petroleum, 1981: 110-120.
[2] Harding T P. Seismic characteristics and identification of negative flower structures, positive flower structures and positive structural inversion[J]. AAPG Bulletin, 1985, 69:582-600. http://cn.bing.com/academic/profile?id=2441248ff905e97760be985dd6c27ba8&encoded=0&v=paper_preview&mkt=zh-cn
[3] Mitra S, Islam Q T. Experimental (clay) models of inversion structures[J]. Tectonophysics, 1994, 230:211-222. doi: 10.1016/0040-1951(94)90136-8
[4] Buchanan P G, McClay K R. Experiments on basin inversion above reactivated domino faults[J]. Marine and Petroleum Geology, 1992(9):486-500. http://d.old.wanfangdata.com.cn/NSTLQK/10.1016-0264-8172(92)90061-I/
[5] Panien M, Schreurs G, Pfiffner A. Sandbox experiments on basin inversion:Testing the influence of basin orientation and basin fill[J]. Journal of Structural Geology, 2005, 27:433-445. doi: 10.1016/j.jsg.2004.11.001
[6] Henk A, Nemcok M. Stress and fracture prediction in inverted half-graben structures[J]. Journal of Structural Geology, 2008, 30:81-97. doi: 10.1016/j.jsg.2007.10.006
[7] 周建勋.半地堑反转构造的砂箱实验模拟[J].地球物理学进展, 1999, 14(3):47-52. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqwlxjz199903005
[8] 阳怀忠, 任建业, 陆金波.东营凹陷负反转构造样式及其运动学特征[J].地球科学——中国地质大学学报, 2009, 34(3):493-499. http://d.old.wanfangdata.com.cn/Periodical/dqkx200903014
[9] 官大勇, 周心怀, 魏钢, 等.旅大22-27区构造反转期次及其对油气成藏的控制作用[J].中国海上油气, 2007, 19(2):85-89. doi: 10.3969/j.issn.1673-1506.2007.02.003
[10] 姜华, 王华, 肖军, 等.珠江口盆地珠Ⅲ坳陷构造反转与油气聚集[J].石油学报, 2008, 29(3):372-377. doi: 10.3321/j.issn:0253-2697.2008.03.011
[11] 王国纯.中国近海盆地的反转构造及其石油地质意义[J].中国海上油气:地质, 1995, 9(1):33-40. http://www.cnki.com.cn/Article/CJFDTotal-ZHSD199501012.htm
[12] 张功成.南海北部陆坡深水区构造演化及其特征[J].石油学报, 2010, 31(4):528-533. http://d.old.wanfangdata.com.cn/Periodical/syxb201004002
[13] 朱伟林, 张功成, 高乐.南海北部大陆边缘盆地油气地质特征与勘探方向[J].石油学报, 2008, 29(1):1-9. http://d.old.wanfangdata.com.cn/Periodical/syxb200801001
[14] 徐士银, 张庆龙, 舒良树, 等.反转构造的识别及其地质意义[J].江苏地质, 2006, 30(1):6-9. http://d.old.wanfangdata.com.cn/Periodical/jsdz200601002
[15] 杨风丽, 王敏雪, 庄建建.西湖凹陷反转构造定量运动学过程及对油气的控制作用[J].石油学报, 2010, 31(4):596-601. http://d.old.wanfangdata.com.cn/Periodical/syxb201004013
[16] 陈刚, 戴俊生, 叶兴树, 等.生长指数与断层落差的对比研究[J].西南石油大学学报, 2007, 29(3):20-23. doi: 10.3863/j.issn.1674-5086.2007.03.006
[17] 苗顺德, 徐建永, 印斌浩.珠江口盆地珠Ⅲ坳陷反转构造特征及有利反转构造区带评价[J].天然气地球科学, 2013, 24(3):566-573. http://d.old.wanfangdata.com.cn/Periodical/trqdqkx201303018
-
图(4)
表(2)
计量
- 文章访问数: 934
- PDF下载数: 61
- 施引文献: 0