Mud Dolomitic Rock Tight Oil Source Reservoir Association Types and Classification

Qun Luo¹, Yan Song¹, Zhenxue Jiang¹, and Cong Xiao Wang^2
1The Unconventional Natural Gas Institute of China University of Petroleum, Chang Ping, Beijing, China
²Exploration and Development Institute of PetroChina, Jiuquan Gansu, China

Source reservoir research symbiotic relationship is the basis of unconventional oil and gas geological evaluation and resource prediction. This is not just because It determines the way of unconventional oil and gas forming conditions and mechanism, and control of unconventional oil and gas enrichment and the distribution of the dessert. Mud dolomitic rock in Jiu Quan basin Qin Xi sag Xiagou group is the favorable zone of tight oil distribution, but the lithology source and reservoir and its combinations are complex, heterogeneity is strong. Moreover, mud dolomitic rock itself can be either as source rocks, and can serve as a reservoir. When fracture are not developed, it is often as hydrocarbon source rocks, when the fracture development in the mud dolomitic rock, and often is as a beneficial reservoir. So, what conditions the mud dolomitic rock has hydrocarbon source conditions, and under what conditions it can be serve as a reservoir? What is main source reservoir combination type, there is no clear, this restrict Study area process of tight oil exploration and development. Reference tight oil research findings of ordos and junggar basin and the researcher area specific geological conditions, this paper draw up mud dolomitic rock development zone source reservoir association basic unit and its characteristics symbol. Source and reservoir composite should be divided into levels and source reservoir classification standard of mud dolomitic rock. Summarized on gave birth to source up and reservoir down, source down and reservoir up, Source reserve one body. The source clip store cec five kinds of single well source reservoir sign association relationship and its characteristics. And source packages reservoir etc., four types of 12 types of source reservoir association. Based on the source reservoir symbiotic matching relations and the principle of unconventional oil and gas accumulation, this paper evaluation of source including source-reservoir interbed type source including source-reservoir a body are the most conducive to the enrichment of tight oil accumulation.

AAPG Datapages/Search and Discovery Article #90180©AAPG/SEPM/China University of Petroleum/PetroChina-RIPED Joint Research Conference, Beijing, China, September 23-28, 2013