Research And Application Of Interlayer Stratified Fracturing Technology For Complex Oil - Water - Thin Layer In

In recent years, reservoir re formation has become a very important method in exploration and formation testing in Qinghai oil field, has achieved good effect and has made an important contribution to increase on oil field. Especially in complex thin reservoir,through the fracture morphology,the key factor in the seam height, technology, construction scale, parameter optimization research, formed a thin interbed of height seam control technology. But the process due to the limitations of itself,need to well killing, tripping out,sand washing works,lead to long construction period,will cause some damage to the reservoir,so it is necessary to expand the new points of subsection of the study,in order to realize the fixed string multilayer fracturing and layered oil and gas. Based on research and field test, formed a thin interbed of height seam control fracturing process:use the control seam height in separate layer fracturing, raising the using of the thin layer and avoid the well water breakthrough in the same time, determine on a string, a perforation, multilayer fracturing technology, to simplify the conventional construction process, shorten the construction period, avoid damage to the reservoir in well killing, to achieve the purpose of rapid accurate evaluation of the reservoir. The technology to further improve the measures of pertinence,as the same time,try to explore the layered fracturing layered testing process, to implement low cost and low cost test with the combination of efficient technology is an important step of exploration and development characteristics. Through this article to know the following1. In northwest qaidam basin is influenced by geological structure, plane distribution range is wide, poor continuity, long reservoir distribution in vertical well, layer number, oil and gas layer between each other more, on the whole present "thin, many, scattered and mixed", the characteristics of reservoir reconstruction is difficult.2. from the basic data analysis, the reservoir rocks shows the characteristics of the plastic, the fracturing construction scale shoulds not be too big, the sensitivity of transformation is the greatest influence to the reservoir water sensitivity effect.3. Due to the small layer on the longitudinal development, conventional temporary plugging pitches layered fracturing, displacement fluid layer fracturing has stronger adaptability.4. Conventional packer slip set of layered fracturing only have the function that the layered fracturing, layered testing to be many times the string, so expensive, do not have the value of promotion, points of subsection test process is "a string, a perforation, multilayer fracturing, layered testing" characteristic, can achieve the purpose of rapid accurate evaluation of the reservoir, to save time to save money, with strong promotion value.