Research On Fracturing Optimization Technology In Deep Volcanic Rock In Xushen Gasfield Of Daqing Oilfield

In recent years, with implementing the strategy of "compensation the oil with gas", the volcanic rock's exploration and auxiliary output technology have made a great progress in Daqing oil field outskirt. Further effort to prospecting in deep gas,found and confirmed a super gas field,which over one hundred billion cubic, make a historic breakthrough.Data from the 9 layers from 6 well, which is fractured volcanic rock reservoir deeper than 4000m in Daqing Xushen deep gas well since2002,shows after 6.5～93m3 proppant used only two layers get the commercial gas flow and the highest output is 6.28×104m3/d, the high pressure gradient of pump stuck occurred 3times, filtration,others have the complex situation such as:high friction in close wells and filtration. the low intensity of remold and the poor output after fracture are common,according the past testing data,the remolding scale to get the commercial gas flow should increase gradually with the depth increasing. So the big scale deep fracturing is a significant trend in future. There must have some difference to the present technology of fracturing optimization and deep fracturing remold. Aim to the situation of low success rate of fracturing in Xushen deep volcanic rock reservoir, this paper is the discussion and study for technology of increasing output by fracturing in Xushen deep volcanic rock.It can foresee the most fracturing implement difficulties in deep volcanic rock reservoir exactly by study the design method of fracturing optimization from deep volcanic rock reservoir,set up the control method of volcanic rock reservoir which include fracturing design,explanation of fracturing test,could enhance the hardness and validity of fracturing remolding. provide the technical support to the further prospect and develop sufficiently in Xushen gas field.