Font Size: a A A

Logging Classification Of Carbonate Reservoirs In The Three Segment And The Permian Maokou Formation Of The Longzi - Yuanba Area

Posted on:2015-11-24Degree:MasterType:Thesis
Country:ChinaCandidate:Y W ZhangFull Text:PDF
GTID:2270330470452982Subject:Geological Engineering
Abstract/Summary:PDF Full Text Request
The resource of marine strata natural gas is very rich in Langzhong-Yuanba area of Northeast Sichuan. Leikoupo formation and Maokou formation have gained exploration breakout or good oil gas show and has great exploration and development potential. However, logging identity and evaluation studies for fracture-cave reservoir in Leikoupo and Maokou formation are still superficial. For supporting further oil and gas exploration in Sichuan Basin, forming logging comprehensive evaluation technology for fracture-cave carbonate reservoir in Langzhong-Yuanba area is the urgent problem to solve.We did a lot of research work aimed at log interpretation technology for fracture-cave carbonate reservoir such as:normalization for conventional logging data of33wells, core lo-cation for six strata of five wells, establishment of logging interpretation model, conventional logging data processing of33wells, imaging logging data processing of7wells, nuclear magnetic resonance logging data processing of5wells, and dipole acoustic logging data pro-cessing of11wells. This paper aimed at the fractured-vuggy reservoir of the4th member of the Leikoupo Formation and the Maokou Formation in Langzhong-yuanba Region, and gave out lithology identification technology according to conventional logging, PE curve, ECS logging and imaging logging. Set up the well-logging interpretation model of fractured-vuggy reservoir, and put forward the computing method of fractured-vuggy porosity by using elec-tro-imaging spectrometry. With the aid of the four properties characteristic, fractured-vuggy identification and physical property parameter calculation, the reservoir identification method is worked out. In this paper, the effective reservoir identification and evaluation method is set-tled, which including fissure filling and corrosion assessment, fracture occurrence and radial extension evaluation, fracture permeability evaluation. And the technology of reservoir fluid identification is built,such as porosity overlay method,Pl/2analytical meth-od,intersection method of porosity and saturation,radial resistivity differential od,intersection method of velocity ratio of compressional wave to shear wave and compres-sional wave slowness intersection method of poisson’s ratio and volumetric compressibility coefficient,fluid identification of nuclear magnetic resonance logging.By using porosity and fracture porosity parameter as the quantitative evaluation index of reservoir type classification, and taking some parameters into account, like reservoir type, electric property characteristic, fluid identification index and so on, the reservoir classification evaluation standard of the4th member of the Leikoupo Formation and the Maokou Formation is established separately.
Keywords/Search Tags:Langzhong-Yuanba area, the4th section of Leikoupo formation, Maokou for-mation, Carbonate rock, Fracture-cave reservoir, Well logging, Classification evaluation
PDF Full Text Request
Related items