Research On Oil Layer Stimulation Technology Of Deep Glutenite In Che-66 Block Of Shengli Oilfield

At present, the explored glutenite reservoir of shengli characteristics of the reservoir from the two main categories, that is represented by Che-66 of carbonatite rock and glutenite, represented by the Yan-22 of normal clastic rock and glutenite. Glutenite reservoir for the rapid deposition of multi-phase product of vertical multi-phase folding,the plane to the slopes overlap to form a complex depositional pattern,resulting in large change of glutenite reservoir thickness, complexity of lithology, serious aeolotropism between interlamination and layer and poor reservoir communication, so a direct impact on the efficient development of this type of reservoir. This paper is based on deep exploration of Shengli oilfield deep glutenite in order to effectively increase production and reform fracturing. It combined with the glutenite reservoir characteristic of Shengli oilfield, respectively, to carry out fracturing optimization design, optimization technology to improve flow conductivity and technology research of effective sand fracturing. This research and design could resolve the key testing problem that restricts deep exploration activity to sustainable development in the long future to attain the designation of increase geologic reserve and accelerate stable yields. This paper preliminarily analysis break form of complex lithology through three axis rock mechanics parameter test of glutenite core; run a monopodium and rule three axis rock mechanics parameter test of four group of core in Che-662 well,and it obtain dynamic rock mechanics parameter of deep glutenite reservoir. Fracturing optimization design sensitivity analysis results showed that when the smaller effective thickness of reservoir wells and lower oil saturation, it should enhance fracturing slit length, to increase the area of diarrhea oil and maximize productivity. This paper study the diagnosis of deep small-scale fracturing, and fracturing the net pressure fitting techniques, screening and evaluation of increased working fluid system; analysis of "pre-slug" technology and reduce the filtration. Through a indoor test of two kinds of proppant showed that the small particle size the greater the proportion of proppant, the smaller flow conductivity, on the contrary, the larger flow conductivity; this gap closed as the pressure increases gradually decreased; for glutenite reservoir permeability is low, the characteristics of poor materials, large-scale fracturing process should be dominated by large-scale fracturing.