准噶尔盆地腹部地区中生界低孔渗储层成因分析

准噶尔盆地腹部以地层、岩性油气藏为主,油气藏主要富集在中生界,由于地处负向构造单元,勘探目的层埋深较大,储层具有低孔、低渗的特点。勘探实践表明,储层物性是制约腹部地区油气富集高产的主要因素;研究结果表明,压实作用、泥质含量、胶结物含量以及溶蚀作用是造成盆地腹部地区中生界储层低孔低渗的根本成因。据此给出了盆地腹部地区储层孔隙的演化模式。该研究结果可为该区沉积相研究和制定增产措施提供借鉴。

Analysis on the genetic of low porosity and permeability of Mesozoic in the hinterland of Jugar Basin

The main reservoir types are stratigraphic and lithologieal in the hinterland of Jugar Basin,and the reservoirs distributed in the Mesozoic.But because the hinterland of Jugar Basin located at the negative element and the deep burial depth of objective formation,the Mesozoic reserveoir has a feature of low porosity and permeability.The practice of exploration indicates that the physical property is the main control factor of oil-gas enrichment in the hinterland of Jugar Basin.The main reasons of low porosity and permeability of Mesozoic in the hinterland of Jugar are compaction,shale contact,cementcontact and corrosion. The evolution pattern of the reserveoir porosity in the hinterland of Jugar Basin is imitated.