Study On The Hydrojet Staged Fracturing For Horizontal Well

The horizontal well is a comprehensive prospect of oil recovery technique, inChina's oil and gas field get applied more and more. Because majority ofhorizontal wells in production capacity does not achieve the desired goals, theimplementation of staged fracturing to improve the productivity of horizontal wellsin low permeability oil and gas fields is needed. The fracturing of horizontal wells inthe way of screen completion is a difficult part of the horizontal well fracturingtechnology. The water jet fracturing technology becomes the key technology toachieve sieve fracturing of horizontal wellsbecause of its unique technicalcharacteristics. Domestically the technology is relative delay, The paper inculingthe mechanism in The fracturing of horizontal wells,downhole tools and theanalysis of horizontal wells,Through the mathematical model, analyticalcalculation and field practice,The paper yields following conclusions:(1) through the establishment of the hole numerical simulation and the pressuredistribution of ring empty the low pressure area numerical simulation for thehydraulic fracturing of horizontal injection parameters are optimized, compiled thehydropower spray fracturing optimal design software, for the next step guidance toprovide the theoretical basis for the field test.(2) The design applies to the water jet fracturing process, downhole tools, and isproved by indoor experiments. The laboratory experimental results demonstratethat the hydraulic gush arenaceous shoot through the casing and the hydraulicblasting with the wear resistance of the nozzle,and a trip to the string moreparagraphs fracturing, save operation process, it is applicable for variouscompletion way, especially open hole and sieve tube of horizontal Wells piecewisefracturing. (3) Using horizontal well productivity theory, carry out the horizontal well stagedfracturing design and implementation. Produce satisfactory results after theimplementationand achieve the goal of a horizontal well staged fracturing andefficient development.(4) Through the field practice The paper established theory and tools obtained abetter effect, optimizing the design of fracturing tools application, which greatlyincreased the capacity of horizontal Wells, capacity evaluation fitting rate reached5.6%. This technology in LiaoHe Oil Field has a broad prospect of application, forthe ten million tons of liaohe stable provide effective technical support.