The Study of a New Overall Hydraulic Fracturing Mode in Low Permeable and Unconventional Reservoirs

摘要

A new fracturing mode is put forward in the paper. Comparedrnwith the former mode, the new one has the followingrnadvancements: 1) Some key reservoir parameters such asrneffective permeability, effective thickness, loss coefficient,rnfracture azimuth and fracture height as well are all regarded asrnstochastic variables according to field statistic results; 2)rnFracture length and conductivity are accordingly stochasticrnvariables as a result of the random distribution of suchrnfracturing treatment parameters as pumping rate, sand tornliquid ratio, pad volume and sand volume as well; 3) As arnresult of undetermined reservoir and fracture variables, thernpost-fracturing rate is stochastic in most cases; 4) Monte Carlornmethod is utilized to perform economic analysis, and thernrelationship of net present value versus probability in a certainrnunconventional reservoir may be available on the base ofrnabove works, so that a decision-making policy may berndetermined accordingly. After that, one field case isrnhydraulically fractured utilizing above strategy, and the postfracturingrneffect is very satisfied, which indicates that the newrnoverall hydraulic fracturing mode put forward in the paper isrnreliable and if it is put in to field applications, a greaterrneconomic benefits may be expected.