The Study On Glutenite Artificial Fracture And Formation Property By Micro-seismic Method

The mainly of Dongying Sag is the low permeability reservoirs, It’s accounting for 63.6% of Low permeability reserves in Shengli oil field. The main reservoir lithology is is glutenite, complicated composition, high reservoir thickness and poor formation property. Yongan field located in the northeast of Dongying Sag. It has explorated and developed from the 1960 s, going through the elastic exploitation,water injection and others stages. With the formation pressure is reduced, the productivity reduced, now it’s in the stage of subtle reservoir exploration and development. And hydraulic fracturing is an important method to transform the low permeability reservoir and increased the production. This technology can be used for mapping the oil and gas reservoir of hydraulic fracturing cracks, through continuous acquiring and processing the micro seismic data which in the process of fracturing, attained the fracture location information and guide the reservoir secondary exploration planning.This paper based on the independent research and development Micro-seismic monitoring instruments and data processing software, which designed by the oil and gas resources institute in China university of petroleum(East China). Using those to monitor the Well Yong 63-10 fracturing process. The results showed fracture strike is northeastward, toward the south spread the range of 100 to 150 m. Single east wing length is about 200 to 250 m, the west wing is about 200 m. Vertical scope is about 80 meters, It shows that maximum horizontal principal stress near the target direction should be east-west, Comparing the actual production after fracturing and fracturing effects; Developing the monitoring equipment and establish a systemic hardware and software micro-seismic monitoring mode.