不同序级走滑断裂对碳酸盐岩储集层发育的控制差异
Differential Controls of Strike-Slip Faults of Different Orders on Carbonate Reservoirs
杜仲元 1李相文 2李青霖 1孙冲 3李默涵 1张冠卿 2但光箭1
作者信息
- 1. 中国石油集团 东方地球物理勘探有限责任公司,河北 涿州 072751
- 2. 中国石油集团 东方地球物理勘探有限责任公司,河北 涿州 072751;中油奥博(成都)科技有限公司,成都 611730
- 3. 中国石油 塔里木油田分公司 勘探开发研究院,新疆 库尔勒 841000
- 折叠
摘要
断控岩溶体系储集空间结构差异制约该类油藏高效开发.目前,对高序级走滑断裂储集层储集空间结构研究较深入,但对低序级走滑断裂储集层储集空间结构研究较少.以塔里木盆地北部坳陷富满油田为例,从断裂活动强度、沉积环境、岩性等方面展开分析,对比不同序级走滑断裂储集层储集空间结构成因及差异,并分析了低序级走滑断裂的成因及勘探潜力.高序级走滑断裂活动强烈,储集层在剖面上呈倒三角式破碎,储集层规模由上至下逐渐减小;低序级走滑断裂活动强度相对较弱,储集层在剖面上呈正三角式破碎,储集层规模由上至下逐渐增大.低序级走滑断裂对地层的破碎规模影响有限,密集发育的裂缝网络可以导致储集层大规模破碎,影响储集层发育的主要因素是沉积环境和岩性.富满油田深层低序级走滑断裂由西向东可分为3个区域,勘探潜力大.
Abstract
Differential spatial structures of the fault-controlled karst reservoirs constrain the efficient development of these reservoirs.The pore structure has been substantially studied for high-order strike-slip fault-controlled reservoirs,but rarely for low-order strike-slip fault-controlled reservoirs.Taking the Fuman oilfield in the northern depression of the Tarim basin as an example,different orders of strike-slip fault-controlled reservoirs were analyzed from the aspects of stress,depositional environment,and lithology,to compare their genesis and differences of pore structure,and the origins and exploration potentials of low-order strike-slip faults were examined.It is found that high-or-der strike-slip faults underwest strong faulting,resulting in an inverted triangular fracture pattern in the reservoir,with a decreasing scale from top to bottom.In contrast,low-order strike-slip faults experienced relatively weaker tectonic stress,leading to a normal triangular frac-ture pattern in the reservoir,with an increasing scale from top to bottom.The fracturing scale induced by low-order strike-slip faults is limit-ed;however,a densely developed fracture network can lead to extensive reservoir fracturing.The primary factors influencing reservoir de-velopment are the depositional environment and lithology.The deep-seated low-order strike-slip faults in the Fuman oilfield can be divided into three zones from west to east,showing significant exploration potential.
关键词
富满油田/走滑断裂/高序级/低序级/储集层/储集空间/勘探潜力Key words
Fuman oilfield/strike-slip fault/high-order/low-order/reservoir/reservoir space/exploration potential引用本文复制引用
出版年
2024
NETL
NSTL
万方数据