川西北地区中泥盆统观雾山组储集层特征、控制因素与演化

发布时间：2018-06-22 09:03

本文选题：储集层特征 + 储集层演化　；参考：《天然气地球科学》2017年07期

【摘要】：川西龙门山地区中泥盆统观雾山组油气勘探获得突破,但对储集层尚无系统研究。通过野外露头、岩心、薄片、阴极发光资料,结合岩石物性分析,对龙门山地区观雾山组储集层特征、控制因素和储集层演化过程进行深入研究。结果表明,观雾山组储集层岩性主要为砾屑白云岩、生物白云岩、生物碎屑白云岩和晶粒白云岩,储集空间以残余粒内溶孔、晶间溶孔、大型溶孔为主,构造裂缝发育,平均孔隙度约为2.85%,储集层主要为礁滩体白云岩裂缝—孔洞型储集层。储集层形成受礁滩体、白云石化作用和溶蚀作用控制,礁滩体是储集层发育的地质基础,白云石化作用是储集层发育的必要条件,溶蚀作用是储集层发育的关键因素,构造作用推动储集层最终形成。储集层经历了3个演化阶段,沉积、白云石化及溶蚀作用奠定了储集空间类型,构造作用改善储集层物性,沥青充填使储集层物性变差。基于储集层主控因素,预测剑阁—江油—绵阳地区古地貌高点的白云岩礁滩体是有利储集层发育区,油气勘探有望取得新突破。
[Abstract]:The oil and gas exploration of the Guanwushan formation of the Middle Devonian in Longmen Mountain area of western Sichuan has made a breakthrough, but there is no systematic study on the reservoir. Based on outcrop, core, thin slice, catholuminescence data and petrophysical analysis, the reservoir characteristics, controlling factors and reservoir evolution process of Guanwushan formation in Longmen Mountain area are studied. The results show that the reservoir lithology of Guanwushan formation is mainly composed of conglomerate dolomite, bioclastic dolomite and grain dolomite. The reservoir space is mainly composed of residual intragranular dissolved pore, intergranular dissolved pore, large dissolved pore, and structural fracture. The average porosity is about 2.85, and the reservoir is mainly composed of dolomite fracture and pore type reservoir. Reservoir formation is controlled by reef beach, dolomitization and dissolution. Reef beach is the geological basis of reservoir development, dolomitization is the necessary condition for reservoir development, and dissolution is the key factor for reservoir development. Tectonic action promotes the formation of reservoir. The reservoir has experienced three stages of evolution: deposition, dolomitization and dissolution have established the reservoir space type, the tectonism has improved the reservoir physical property, and the asphalt filling has made the reservoir physical property worse. Based on the main reservoir control factors, the prediction of the dolomite reef beach body at the high point of paleogeomorphology in Jiango-Jiangyou-Mianyang area is a favorable reservoir development area, and oil and gas exploration is expected to make a new breakthrough.
【作者单位】：中国石油勘探开发研究院;中国石油杭州地质研究院;中国石油集团碳酸盐岩储层重点实验室;中国石油西南油气田公司勘探开发研究院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(编号:2016ZX05004-002) 中国石油集团科技重大专项“深层油气勘探开发关键技术研究”(编号:2014E-32-09)联合资助
【分类号】：P618.13

【参考文献】