渤海S油田下古生界碳酸盐岩储层主控因素分析
|
摘要
渤海S油田下古生界古潜山发育浅海台地相碳酸盐岩储层。依据岩心、薄片观察、地震反演等资料,对渤海S油田下古生界碳酸盐岩储层的沉积环境及成岩作用进行了分析。结果表明下古生界古潜山主要发育白云岩、白云质灰岩,整体属于低孔、低渗储层,储层物性主要受控于沉积类型;花岗岩基底及海平面变化控制了储层发育;白云石化作用及成岩作用为后期储层物性改造提供了有利条件;构造作用产生的断裂和裂缝进一步改善了储层的储集性能。
Lower Paleozoic buried hills in Bohai S oilfield develop shallow platform facies carbonate reservoirs. Based on core, thin section observation and seismic inversion data, the sedimentary environment and diagenesis of Lower Paleozoic carbonate reservoirs in Bohai S oilfield are analyzed in this paper. The results show that the Lower Paleozoic buried hills mainly develop dolomite and dolomitic limestone, which as a whole belongs to low-porosity and low-permeability reservoirs. Reservoir physical properties are mainly controlled by different platform facies deposition types. The development of reservoirs in different platform facies is controlled by the changes of granite basement and sea level. The dolomitization and constructive diagenesis provide favorable conditions for the reservoirs' later physical transformation. The fractures and cracks caused by the tectonic action further improve the reservoir performance.
Lower Paleozoic buried hills in Bohai S oilfield develop shallow platform facies carbonate reservoirs. Based on core, thin section observation and seismic inversion data, the sedimentary environment and diagenesis of Lower Paleozoic carbonate reservoirs in Bohai S oilfield are analyzed in this paper. The results show that the Lower Paleozoic buried hills mainly develop dolomite and dolomitic limestone, which as a whole belongs to low-porosity and low-permeability reservoirs. Reservoir physical properties are mainly controlled by different platform facies deposition types. The development of reservoirs in different platform facies is controlled by the changes of granite basement and sea level. The dolomitization and constructive diagenesis provide favorable conditions for the reservoirs' later physical transformation. The fractures and cracks caused by the tectonic action further improve the reservoir performance.
引文
[1] RIDING R.Microbial Carbonates-the Geological Record of Calcified Bacterial-algal Mats and Biofilms[J].Sedimentology,2000(1):179-214.
[2] 祖克威,程秀申,罗周亮,等.复杂碳酸盐岩储层裂缝预测方法对比性研究[J].地质力学学报,2018(4):465-473.
[3] 李卓,张建民,郭诚,等.渤海南部古潜山油气田成藏机理及展布规律研究[J].石油地质与工程,2017(3):58-59.
[4] 王兴志,侯方浩,方少仙,等.资阳灯影组二、三段微相组合对储层的控制[J].中国海上油气,2011(4):62-65.
[5] 吴坚,高新丰,袁波,等.准噶尔盆地白家海凸起侏罗系油气成藏期次分析[J].石油天然气学报,2012(2):171-172.
[6] 李玲玲.塔南凹陷火山碎屑岩成岩作用特征[J].科学技术与工程,2011(11):56-57.
[7] 韦红,赵海峰,唐何兵,等.渤海盆地潜山下古生界岩溶古地貌特征分析——以W油气田为例[J].非常规油气,2016(6):31-35.
[8] 王建民,王佳媛,沙建怀,等.鄂尔多斯盆地东部奥陶系风化壳岩溶古地貌特征及综合地质模型[J].吉林大学学报(地球科学版),2014(2):409-418.
[9] 王高平,王震亮,赵雪娇,等.鄂尔多斯盆地延安地区奥陶系风化壳古地貌恢复[J].2013(4):564-565.
[10] 张敏,尹成明,寿建峰,等.柴达木盆地西部地区古近系及新近系碳酸盐岩沉积相[J].古地理学报,2004(4):391-400.
[11] 于炳松,樊太亮.塔里木盆地寒武系-奥陶系泥质烃源岩发育的构造和沉积背景控制[J].现代地质,2008(4):534-539.
[2] 祖克威,程秀申,罗周亮,等.复杂碳酸盐岩储层裂缝预测方法对比性研究[J].地质力学学报,2018(4):465-473.
[3] 李卓,张建民,郭诚,等.渤海南部古潜山油气田成藏机理及展布规律研究[J].石油地质与工程,2017(3):58-59.
[4] 王兴志,侯方浩,方少仙,等.资阳灯影组二、三段微相组合对储层的控制[J].中国海上油气,2011(4):62-65.
[5] 吴坚,高新丰,袁波,等.准噶尔盆地白家海凸起侏罗系油气成藏期次分析[J].石油天然气学报,2012(2):171-172.
[6] 李玲玲.塔南凹陷火山碎屑岩成岩作用特征[J].科学技术与工程,2011(11):56-57.
[7] 韦红,赵海峰,唐何兵,等.渤海盆地潜山下古生界岩溶古地貌特征分析——以W油气田为例[J].非常规油气,2016(6):31-35.
[8] 王建民,王佳媛,沙建怀,等.鄂尔多斯盆地东部奥陶系风化壳岩溶古地貌特征及综合地质模型[J].吉林大学学报(地球科学版),2014(2):409-418.
[9] 王高平,王震亮,赵雪娇,等.鄂尔多斯盆地延安地区奥陶系风化壳古地貌恢复[J].2013(4):564-565.
[10] 张敏,尹成明,寿建峰,等.柴达木盆地西部地区古近系及新近系碳酸盐岩沉积相[J].古地理学报,2004(4):391-400.
[11] 于炳松,樊太亮.塔里木盆地寒武系-奥陶系泥质烃源岩发育的构造和沉积背景控制[J].现代地质,2008(4):534-539.