Controlling Factors for Reservoirs Distribution of the Putaohua Oil Layer in the Saozhao Sag

Abstract:

Types of found reservoirs and its distribution characteristics of Putaohua oil layer in the Sanzhao Sag were analyzed. The controlling factors of hydrocarbon distribution were investigated. Sanzhao Sag is Sag-wide oil-bearing, but its distribution of oil and water is extremely complicated. The reservoir types are mainly fault block reservoirs, low amplitude structure reservoirs, fault-lithologic reservoirs and lithologic reservoirs. The distribution of reservoirs is mainly controlled by three geological factors: first, long-term inherited nose-like structure is predominant direction of petroleum migration; it induced oil and gas migration at a critical period of hydrocarbon accumulation and formed oil-gas accumulation area. Second, fault across main-line of hydrocarbon migration and high angle skew plug off hydrocarbon, and its side adjacent to Sag is a large number of hydrocarbon accumulation areas. Third, multi-fault region can easily form a fault (-lithological) reservoir accumulation area in the slope of sag.

• Periodical: Advanced Materials Research (Volumes 616-618)
• Pages: 816-820
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.616-618.816
• Online since: December 2012
• Authors: Yu Sun, Shi Zhong Ma, Bai Quan Yan, Chen Chen
• Keywords: Hydrocarbon Accumulation Model, Putaohua Oil Layer, Reservoirs Distribution, Sanzhao Sag

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