ABSTRACT:

Aiming at the development of thick glutenite reservoirs, the conventional overall fracturing often leads to problems such as low proppant placement efficiency and rapid production decline. In this paper, the influence of proppant settlement equilibrium height and proppant motion on proppant transport after pump stop is considered, and a proppant settlement transport model is established. The model calculation results show that the perforation position and proppant density are the main factors affecting the size of the propped fracture and the morphology of the proppant placement. A novel hydraulic fracturing technology is proposed based on the analysis of settlement factors. The proppant fracture shape is adjusted by centralized perforation in each interval of thick reservoir, and the proppant laying profile in thick reservoir is adjusted by adding proppant with different densities in different order. The technology is applied to more than 20 wells in the thick glutenite reservoirs in the Bohai Bay Basin, Eastern China. The proppant is evenly laid in the main production layers, and the average daily oil production increases by 7.4t. The hydraulic fracturing method can be used to improve the proppant placement efficiency in the conventional overall fracturing method and p provide guidance for the fracturing design in thick glutenite reservoir.

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