Jiulong Mountain Region Pearl Punch Set, XUJIAHE Stimulations Evaluation And Optimization

Jiulong Mountain is located in northern Sichuan Basin in West Sichuan area, gas bearing area is big, one of the main gas-bearing intervals to be the2nd member of the Xujiahe formation (T3X2) and the Zhenzhuchong formation (J1z). Gas reservoirs with burial depth, high temperature, high pressure rupture characteristics of the Jiulong Mountain Region shall, the T3X2, the J1z belong to dense lithology reservoir, from the T3X2section and the J1z development of low permeability gas reservoir, has not yet formed a set of effective reservoirs, low permeability gas reservoir supporting the development of technology and the development effect of the lack of breakthrough. In this paper, taking Jiulong Mountain reservoir of low damage reservoir transformation technology as the research object, based on Jiulong Mountain reservoir geological characteristics of the system analysis. Carried out a series of related experiments with the stimulation, the reservoir damage, determination, through the mineral composition of core solution, slurry corrosion experiment, core physical experiments, additive experiment, water-blocking experiment, evaluation and acidizing technology adaptability in Jiulong Mountain area; based on the analysis and process adaptability evaluation of acidification or fracturing effect, put forward the reform mode and measures shall be theT3X2, the J1z reservoir strategies; evaluation analysis of single well, provide the feasible advice for the new development well production in Jiulong Mountain area.Through research, obtained the recognition and suggestions in the following aspects:(1), Acidification is the key to success for effective corrosion mud and mud filtrate contamination, but the scene from different manufacturers of mud acid corrosion rate is low, flooding effect is not good, should be added to the higher slurry erosion ability of strong acid acid system in the Jiulong Mountain area;(2), Good in structural high, the deployment of the wells are made of better effect, and away from the poor areas with high point in the well construction. Which is the main reason for early acidizing well better;(3), Jiulong Mountain pearl Chong group reservoir has strong heterogeneity, fractures control the gas well deliverability, deployed in the crack larger, extended a long distance on a strip of wells often better (4), Jiulong Mountain area shall be the T3X2of the reservoir a dense layer, crack development, as much as possible make long slot, communication far wellbore reservoir, reservoir, oil and gas area increases, both improve the fracture flow conductivity, so as to improve the fracturing effect, suggestions on the selection of sand operations;(5),The stimulation of acid distribution scale should not be too large, process. The number of not too much, not only guarantee the effect of uniform acid distribution, but also improve the flowback rate, reaching the purpose of reservoir protection;The research results of this paper can be used for gas reservoir in Jiulong Mountain, to provide theoretical guidance for the single well production, which is important to the efficient development of gas fields in Jiulong Mountain, but also provide a reference for the similar gas reservoir reforming.