Research Into The Fracturing Technique Of Low Porosity & Low Permeability Reservoir In Periphery Of Liaohe Oilfield

With the constant expansion of exploring range in Liaohe Oilfield, some new mesozoicreservoirs are gradually recognized in the blocks such as Naiman depression, Lujiapudepression, Zhangqiang depression and Longwantong depression. Naiman depression,Lujiapu depression, and Zhangqiang depression are the three main areas in the periphery ofLiaohe oilfield. The common characters of these peripheral areas are low pressure, lowporosity, low permeability, low saturation, low oil and low formation temperature, which arecalled"six low"for short. These characters badly hamper the effective development ofeconomies. Because of the low naturalness productivity of single well, some reservoirstimulation technologies need be followed up. Subject to the existing technological level, thereservoir stimulation technologies of peripheral Miocene basin in Liaohe oilfield may needfurther investigation. Therefore, improving the existing technological level and exploring thedeep undeveloped reservoir effectively have been an important task to stimulate in Liaohe oilfield.The major objective of this thesis is to study Naiman depression. Based on theinvestigation of comprehensive literatures about the stimulation technology of such reservoirinside and abroad, we carried on such works as the evaluation research of fracturing reservoir,the research of dispensing fracturing fluids and instant dissolving viscosifier in field, theoptimization and evaluation of fracturing material, the fracturing technology of lowtemperature enzyme, the formation of the whole development program about water injectionblock. The above research achievement provides the guarantee to the renovation of lowporosity and low permeability reservoir in peripheral Miocene, which can also provide strongtechnical support to the exploration and development of peripheral Mesozoic reservoir forOilfield CoMPany.Through the application of matched technologies and above researches, the entirefracturing treatment level in the external block of Liaohe has been improved. Since from2006 in Naiman oilfield, the sum of fracturing treatment wells is 60, the cumulative stimulation production has achieved 6 million tons, and the productivity per year hasachieved 10 million tons. The advancement and improvement of fracturing technology, isplaying an important role in the development of this block, and also broadening the range ofexploration and oil testing in the peripheral block of Liaohe oilfield, in the end, the peripheralmesozoic reservoir which is low porosity and low permeability can be developed effectively.It can improve the overall lever of fracturing treatment in Liaohe oilfield, furthermore it hasgreat meanings to increase the potential production of oilfield.