关键词: 储层特征, 控制因素, 百口泉组, 乌尔禾油田, 准噶尔盆地

Abstract: Based on a great deal of analytical data of rock and mineral, including cores, thin sections, SEM, X-ray diffraction and mercury injection, this paper systematically studies the micro-pore structure characteristics of reservoirs in Baikouquan Formation of Wuerhe Oilfield of Junggar Basin, and analyzes the controlling factors of reservoir performance. The study result indicates that the reservoir has low compositional maturity and media textural maturity, and reservoirs are of large pore size and small-medium throat size. The sedimentary facies is the main controlling factor of reservoir development. Sandy conglomerate, which deposited in braided channel of middle-fan facies, is the fundamental component of good reservoirs. Diagenesis is the controlling factor of reservoir performance. Compaction decreased the porosity, cementation and dissolution affected reservoir limitedly. In addition, the grain crack fractures, caused by compaction or lateral stress, are the unique of the diagenesis in this area. It can provide more reservoir space and seepage channel for oil and gas accumulation, which will improve the reservoir performance.

Key words: reservoir feature, controlling factor, Baikouquan Formation, Wuerhe Oilfield, Junggar Basin