摘要
以川西拗陷中江气田沙溪庙组为例,开展储层渗透率的预测,为建立基于渗透率的储层精细评价奠定基础。通过对渗透率与碎屑组分、粒度、分选性及微裂缝发育程度的相关性分析,认为影响渗透率的地质因素主要是孔隙度、岩石粒度及微裂缝发育程度。在分别建立孔隙度、粒度及裂缝发育程度预测模型的基础上,通过多参数拟合方法建立了基于"粒度、砂体构型、到断层的距离、构造形变强度及多属性裂缝预测"的地质-地震约束的多参数渗透率综合预测模型。采用新模型计算的渗透率与实测渗透率具有更好的一致性,比单一的孔-渗预测模型具有更高的预测精度。
For tight sandstone reservoirs, the permeability is more comprehensive than the porosity in the aspect of accumulation and productive competence of reservoirs. Therefore, it is necessary to carry out the prediction of reservoir permeability and lay a foundation for the meticulous evaluation of reservoir based on permeability. The correlation analysis of permeability with rock composition, grain size, sorting, and micro fracture development degree reveals that the main geological factors affecting the permeability are porosity, grain size and micro fracture development degree. On the basis of prediction models of porosity, grain size and micro fracture development degree respectively, a geological and seismic multiple parameter comprehensive prediction model is established through the multiple parameter matching method involved in grain size, sand body configuration, fault distance and deformation intensity. It shows that the permeability calculated by the proposed new model is not only consistent with the virtual permeability, but also possesses much higher prediction accuracy.
作者
蔡李梅
叶素娟
付菊
南红丽
蒙欣
CAI Limei;YE Sujuan;FU Ju;NAN Hongli;MENG Xin(Exploration and Production Research Institute,Southwest Oil ＆ Gas Company of SINOPEC,Chengdu 610041,China)
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第4期468-477,共10页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家科技重大专项(2016ZX05002-004)
关键词
多参数约束
致密砂岩储层
渗透率预测
中江气田
沙溪庙组
multi parameter constrain
tight sandstone reservoir
permeability prediction
Zhongjianggas field
Shaximiao Formation
