准噶尔盆地储层中方沸石的溶蚀作用  

Corrosion of analcite in reservoir of Junggar Basin

作　　者：韩守华[1] 余和中[1] 斯春松[1] 陈淑慧[1] 陈能贵[1] 于笠[2] 

机构地区：[1]中国石油勘探开发研究院杭州地质研究所,浙江杭州310023 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《石油学报》2007年第3期51-54,62,共5页Acta Petrolei Sinica

基　　金：中国石油天然气股份有限公司科技攻关项目(10623)"准噶尔盆地腹部主要目的层系沉积体系分析及有利目标区预测"资助

摘　　要：大量铸体薄片镜下观察表明,准噶尔盆地夏子街—玛湖西斜坡储层的储集空间主要为方沸石、方解石及菱铁矿溶蚀后形成的孔隙,其中以方沸石溶孔为主。方沸石溶孔主要发育于三叠系下克拉玛依组的中段、下段和百口泉组,最高面孔率可达6.0%。方沸石的溶蚀作用发生于晚成岩阶段,纵向上随着埋深加大,其溶蚀作用有所增强。由北向南方沸石溶蚀形成的孔隙呈现出发育带—较发育带—不发育带的趋势。这些以方沸石溶蚀作用为主导的次生溶孔的形成,大大改善了该区储层的物性。A lot of data from casting thin observation show that the pore spaces in the reservoir of Xiazijie-Mahu western slope in Junggar Basin are the pores resulted from corrosion of analcites, calcites and siderites. The most pores were generated from corrosion of analcites. The solution void of analcites developed in the middle and lower sections of Karamay Formation and Baikouquan Formation in the Triassic. The highest area-porosity ratio may be 6. 0% in Baikouquan Formation and the middle and lower sections of Karamay Formation. The corrosion of analcites happened in the late diagenesis stage. In the vertical direction, corrosion would be stronger as buried depth gets deeper. In horizontal, the pores resulted from corrosion of analcites extended the best-developed to better-developed to non-developed from north to south in this area. The secondary porosity dominated by corrosion of analcites in this area improved the physical property of reservoirs.

关 键 词：准噶尔盆地 储层物性 孔隙类型 方沸石 溶蚀作用 

分 类 号：TE112.23[石油与天然气工程—油气勘探]