Study On Fracturing Technique In Low Permeable Reservoirs Of Heavy Oil In Naiman Oil Field

Naiman Oil Field is an ordinary heavy oil reservoir with low porosity, low permeabilityand low pressure. It is great significance in the fracturing technological research to develop atlow cost and high efficiency，improve the overall efficiency of low permeability and maintaina steady increasing of the output in Naiman Oil Field.First, the technological research of separate-layer fracture in the same wells. It isnecessary to verificate a multilayer pressure or commingled fracturing technology todetermine the separate-layer fracturing technique whether suitable for Naiman Oil Field. Ifthe technique adapts the reservoir，it can realize the goal that with one well fracturing pipe indispose of three layers, increasing the yield of the one well. Adopting the field tests of3-5wells at locale，effectiveness of measure up to90%，the output of single-layer oil cycle up to6months.Second，it is to verificate the evaluation and use for the low damage of lean fracturingfluid, the solution of fracturing fluid that residued in block cracked channel in formationafter the function and reservoir and clay mineral micro characteristics. To analyze thecompatibility of clean fracturing fluid with reservoir and to contrast the ordinary fracturingfluid with the clean fracturing fluid. It will apply the measurement for the2wells andevaluate the effects of using clean fracturing fluid. After the implementation of cleanfracturing fluid, the average increment in oil production of one well was up to1.5tons daily.