鄂尔多斯盆地白豹地区长6砂岩成岩作用及其对储层物性的影响

SANDSTONE DIAGENESIS AND THE INFLUENCE ON CHANG 6 RESERVOIR OF BAIBAO AREA, ORDOS BASIN

郭伟 史丹妮 何顺利

Guo Wei Shi Danni He Shunli

中国石油大学, 石油天然气工程学院, 北京, 100249 2. 中国石油化工股份有限公司, 石油勘探开发研究院, 北京, 100083

Faculty of Petroleum Engineering, China University of Petroleum, Beijing 102249, China 2. SINOPEC Exploration and Production Research Institute, Beijing 100083, China

基于砂岩薄片、铸体薄片、扫描电镜和X-衍射分析,研究了鄂尔多斯盆地华庆油田白豹地区长6砂岩储层的成岩作用,认为长6储层处于中成岩B期阶段。压实作用和碳酸盐胶结作用对砂岩的原生孔隙结构破坏强烈,使物性变差;粘土矿物的胶结作用,使得渗透性变差,但由于绿泥石薄膜的发育,使得孔隙度有变好的趋势;溶蚀作用和破裂作用则有效地改善了砂岩的孔隙结构,对物性的改善起到建设性作用。

Based on the data analysis of casting lamella,scan lectron microscope and X-ray diffractions etc,the diagenesis is belong to the"B"middle diagenesis on the Chang 6 reservoirs in Baibao area of the Ordos Basin.The compaction and carbonate-cementation destroy the primary-texture of pore intensively,which deteriorate the physical property.The cementation of clay minerals improve the pore for growth of chlorite,but will deteriorate the permeability since they jamed the throat.Dissolution and fracturing change the pore structure effectively,which improved the physical property of reservoirs.

国家重大专项子专题(2008ZX05009-004-03)

https://doi.org/10.11781/sysydz201003227