裂缝发育程度是影响裂缝性油气藏产能的决定因素。为了更好地揭示裂缝性油藏的发育特征，根据三维地震资料解释成果结合FMI 成像测井资料，利用构造要素相关性分析及构造解析方法，探讨了Sinjar 隆起西部倾末端裂缝发育特征及形成机制。研究结果表明：Sinjar 隆起西部裂缝发育特征在纵向上存在分层性，从深层向浅层裂缝走向呈现逆时针旋转的特征，认为裂缝的发育和早期张性大断裂在后期的走滑再活动有关。走滑断裂从深层到浅层逐渐偏离原断层走向，剪破裂方向从深层向浅层逐渐分叉，越往上破裂方向越远离主断层，同样影响了裂缝的走向。由于深层大断裂和浅层裂缝发育存在一定相关性，受深层断裂的影响，裂缝发育强度由Jaddala 组向Chilou 组逐渐变弱，而裂缝又是碳酸盐岩储集层的关键元素，因此深层走滑断裂带发育的区域是寻找优质储层的有力目标。
The development extent of fractures is a decisive factor that affects the productivity of a fractured reservoir. In order to better understand and reveal the development characteristic of a fractured reservoir, the characteristics and the formation mechanism of fractures in the west tip of Sinjar uplift are studied using the methods of structural analysis and correlation of structural elements based on 3D seismic and FMI data. The fractures are vertically stratified with anticlockwise- rotating strikes from lower to upper formations. The development of the fractures sees a close relationship with the reactivation of large faults developed in the underlying layers. The reactivated deep faults in the later stage are the strike-slip faults, and the strikes rotate anticlockwise while developing upward, which affects the orientation of new fractures developed on the top layer of the strike-slip faults. Due to the importance of fractures to carbonate reservoirs, and the close relationship between the shallow fractures and the deep-burying strike-slip faults, the intensity of fractures is decreasing upward from Jaddala formation to Chilou formation, and the areas with deep faults being developed shall be good prospecting places.
[1] 黄捍东, 魏修成, 叶连池, 等. 碳酸盐岩裂缝性储层研究的地球物理基础[J]. 石油地球物理勘探, 2001, 36(5) : 591-596. Huang Handong, Wei Xiucheng, Ye Lianchi, et al. Geology-physical bases of studying carbonate- fractured reservoir[J]. Oil Geophysical Prospecting, 2001, 36(5): 591-596.
[2] Brew G, Litak R, Barazangi M, et al. Tectonic evolution of northeast Syria: Regional implications and hydrocarbon prospects[J]. GeoArabia, 1999, 4(3): 289-318.
[3] Kent W N, Hickman R G. Structural development of Jebel Abd Al Aziz, northeast Syria [J]. GeoArabia, 1997, 2(3): 307-330.
[4] Brew G, Barazangi M. Tectonic and geologic evolution of Syria [J]. GeoArabia, 2001, 6 (4): 573-616.
[5] Litak R K, Barazangi M G, Brew G, et al. Structure and evolution of the petroliferous Euphrates Graben system, Southeast Syria[J]. AAPG Bulletin, 1998, 82(6): 1173-1190.
[6] McBride J H, Barazangi M, Best J, et al. Seismic reflection structure of Intracratonic Palmyride fold- thrust belt and surrounding Arabian platform, Syria[J]. AAPG Bulletin, 1990, 74(3): 238-259.
[7] Best J A, Barazangi M, Al-Saad D, et al. Continental margin evolution of the northern Arabian platform in Syria[J]. AAPG Bulletin, 1993, 77 (2): 173-193.
[8] 邓模, 瞿国英, 蔡忠贤. 常规测井方法识别碳酸盐岩储层裂缝[J]. 地质学刊, 2009, 33(1): 75-78. Deng Mo, Qu Guoying, Cai Zhongxian. Fracture identification for carbonate reservoir by conventional well logging[J]. Journal of Geology, 2009, 33(1): 75-78.
[9] 李楠, 李巍然, 龙海燕. 南黄海盆地北部坳陷正反转构造[J]. 海洋地质与第四纪地质, 2013, 33(3): 95-100. Li Nan, Li Weiran, Long Haiyan. Study of positive inversion structures in the north depression of the south Yellow Sea Basin[J]. Marine Geology & Quaternary Geology, 2013, 33(3): 95-100.
[10] Mitra S. Geometry and kinematic evolution of inversion structures[J]. AAPG Bulletin, 1993, 77(7): 1159-1191.
[11] Zanchi A, Berra F, Mattei M, et al. Inversion tectonics in central Alborz, Iran[J]. Journal of Structural Geology, 2006, 28(11): 2023-2037.
[12] 赵中平, 邓宏文, 刘慧峰. 肯基亚克油田石炭纪孤立碳酸盐台地边缘的储层特征及分类评价[J]. 海洋地质与第四纪地质, 2011, 31(2): 111-119. Zhao Zhongping, Deng Hongwen, Liu Huifeng. The characteristics, classfication and appraisal of the reservoirs at carboniferous isolated carbonate platform margin in Kenjiyak oil field[J]. Marine Geology & Quaternary Geology, 2011, 31(2): 111-119.
[13] Peacock D C P. The temporal relationship between joints and faults[J]. Journal of Structural Geology, 2001, 23(2-3): 329-341.
[14] Whitaker A E, Engelder T. Characterizing stress fields in the upper crust using joint orientation distributions[J]. Journal of Structural Geology, 2005, 27(10): 1778-1787.
[15] Eyaly. Stress field fluctuations along the Dead sea rift since the middle Miocene[J]. Tectonics. 1996, 15(1): 157-170.
[16] 郭令智, 朱文斌, 马瑞士, 等. 论构造耦合作用[J]. 大地构造与成矿学, 2003, 27(3): 197-205. Guo Lingzhi, Zhu Wenbin, Ma Ruishi, et al. Discussion on the structural coupling[J]. Geotectonica et Metallogenia, 2003, 27(3): 197-205.
[17] 陶涛, 季建清, 周立宏, 等. 逆序断裂的发育特征与地震反射识别[J]. 地质科学, 2010, 45(2): 380-394. Tao Tao, Ji Jianqing, Zhou Lihong, et al. Development characteristics and identification from the seismic reflection profiles of the reverse grading faults[J]. Chinese Journal of Geology, 2003, 27(3): 197-205.
