| 马岭油田南二区延9油藏注水开发储集层特征变化研究 |
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| 引用本文： | 曹宝格,韩永林,余永进,肖玲.马岭油田南二区延9油藏注水开发储集层特征变化研究[J].新疆地质,2019(3):373-377. |
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| 作者姓名： | 曹宝格 韩永林 余永进 肖玲 |
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| 作者单位： | 西安石油大学陕西省油气田特种增产技术重点实验室西安石油大学石油工程学院;长庆油田分公司采油二厂;西安石油大学地球科学与工程学院 |
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| 基金项目： | 陕西省重点研发计划项目——低渗油田生物酶提高采收率的作用机理与应用研究（2018KW-037）资助 |
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| 摘 要： | 为了解马岭油田南二区延9油藏长期注水后储层特征的变化及产生机理,通过室内物理模拟实验方法,结合矿场2口检查井取心分析结果,研究了注水前后储层物性、孔喉特征和渗流特征的变化。结果表明:长期注水后,由于注入水对储层的作用主要集中在孔隙的喉道部分,储层渗透率明显增大,孔隙度增加较小;储层物性的增加主要与水洗后粘土矿物含量的降低、水洗程度、储层初始渗透率大小和裂缝的开启有关,其中裂缝开启对储层物性的影响最显著;水洗后储层岩石表面油膜脱落,岩石润湿性由亲油性变为亲水性。以上综合作用的结果使油水两相流动能力增强、两相区范围变宽,水驱油效率增大。可见马岭油田南二区延9油藏注水开发中储层的变化有利于油田开发。
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| 关 键 词： | 储层物性 粘土矿物 润湿性 相对渗透率 |
Study on Reservoir Characteristics Change in Waterflooding Development in Yan 9 Reservoir of Nan2 District of Maling Oilfield |
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| Cao Baoge,Han Yonglin,Yu Yongjin,Xiao Ling.Study on Reservoir Characteristics Change in Waterflooding Development in Yan 9 Reservoir of Nan2 District of Maling Oilfield[J].Xinjiang Geology,2019(3):373-377. |
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| Authors: | Cao Baoge Han Yonglin Yu Yongjin Xiao Ling |
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| Institution: | (Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs in Xi’an Shiyou University,Petroleum Engineering Institute,Xi’an Shiyou University,Xi’an,Shaanxi,710065,China;Changqing Oilfield No.2 Production Plant,Qingcheng,Gansu,745106,China;School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an,Shaanxi,710065,China) |
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| Abstract: | In order to understand the variation of the reservoir characteristics and its mechanism after long-term water injection in Yan 9 reservoir of the second district of Maling oilfield,based on the results of laboratory experiments and two Wells in the oilfield,the reservoir physical properties,pore-throat characteristics and seepage characteristics were studied in this paper.The results show that,after long-term water injection,because the effect of water injection on the res- ervoir is mainly concentrated in the throat of the pore,the permeability of the reservoir increases significantly,and the po- rosity increases less;the increase of reservoir physical properties is mainly related to the reduction of clay mineral con- tent, the degree of washing, the initial permeability of the reservoir and the opening of fractures,in which fracture open- ing has the most significant effect on reservoir physical properties;after washing, the oil film on the surface of reservoir rock falls off, and the wettability of the rock changes from the hydrophilic to hydrophilic.As a result of the above combi- nation,the flow capacity of oil and water is enhanced,the range of two phase areas is widened,and the efficiency of water displacement is increased.It can be seen that the changes of reservoir in the water injection development of Yan9 reser- voir in Nan2 District of Maling Oilfield is beneficial to the development of oil fields. |
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| Keywords: | Reservoir property Clay minerals Wettability Relative permeability |
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