Gas Reservoir Of Permian In High Hydraulic Pressure Crack Width Of Logging Prediction

Sulige gas field has a considerable geological reserves, and geological conditions is extremely complex there, with a typical characteristics of low porosity, low permeability, low pressure, low-yielding. natural capacity of most of the wells are low, fracture and other stimulation can improve the production of single well. With the widely use in the Sulige gas field, Dipole shear wave well logging technology has been initially confirmed the feasibility of the dipole shear evaluation of pressure cracks, but evaluation methods or standards accompanying the fracturing effect are short of. Because large-scale hydraulic fracturing is conducted in Sulige gas field, the pre-construction design and the evaluation and interpretation of the fracturing effect are particularly important.The paper in order for the object of Permian system reservior in Sulige Gas field, as the theoretical basis of Reservoir engineering and Rock mechanics, there are mainly about the following five points:①Triaxial test of rock mechanics and parameters calculated.②The preference for the calculation models of the pore pressure, formation pressure and fracture pressure of work place.③The three-dimensional extension of hydraulic fractures prediction methods researching.④The study of the fracturing evaluation method and the establishment of the evaluation.⑤rocessing and interpreting the well-logging information of some wells in work place based on the Forward.net platform. There are following five important achievements:(1)The paper analyzes and sorts out the performance data of Triaxial test of rock mechanics of some cores of the workplace, process the Array acoustic logging data, extract the P-S wave offset time, and establish the model of rock inherent strength, founds the formulators calculating Biot and converting the dynamic and static rock mechanics parameters. The sections of rock mechanical characteristics in the workplace are established.(2) Optimizating and improving the models of the formation pore pressure, horizontal in-situ stress and fracture pressure calculation for apply to Sulige gas field, and establishing the corresponding sections in the wore area.(3) Optimizating and improving the forecast models of the fracture height and width, and exploratory research the forecast of the fracture length, and confirm the fracturing parameters of the reasonable fracture morphology.(4) Compare and analysis the method of evalue the effect of hydrofracture, and optimized the method which based on shear wave anisotropy in fissuredformation to evalue the effect of reservoir fracturing, and established the evaluation index of the fracturing effection.(5) According to the calculation models above, with the help of Forward.net platform, program composit with FORTRAN and VB to forecast the three-dimensional extension of the hydrofracture based on the logging data.Based on the study above, a set of evaluation methods and techniques that can predict pressure the crack extension with the logging data and evaluate the fracturing effect, which can effectively forecast the pressure crack extension and determine the parameters of the fracturing operation in the extension of the cracks, the ideal forecast is consistent with other engineering software, with a good comparability with the common fracturing forecast software.