The Research Of Temperature Characteristics In Carbonate Reservoirs And Temperature Logging Data Applications

Formation temperature is the energy of the oil and gas development, but also the importantparameters in oil and gas development. High or low temperature of the reservoirs not onlydetermines the nature of the oil and gas, also the development way. In view of the many aspects ofoil and gas development will cause the change of the temperature field in the wells, so thetemperature logging can solve many production problems. Quantitative applications need to solvethe complex downhole temperature field, qualitative applications usually comparative analysismethod.Formation temperature gradually increased with the depth,under normal circumstances, thewellbore temperature curve and ground temperature profile is the same,however, In the late drilling,water injection, liquids production process the ground temperature profile have been impacted.Therefore, only shut for a long time after logging, to get the natural ground temperature profile ofthe temperature field, so using well test data to establish temperature field. In this study, the first tounderstand the Tahe Oilfield carbonate reservoir temperature distribution from a macro perspective,setting up the temperature profile of the different wells,and restoring the original temperature of thereservoir, through the data comparison analysis, the macro-control the temperature change,excluding temperature anomaly data, obtaining the natural formation temperature data, thenestablishing the study area2,4,6block temperature field distribution maps. As the carbonatereservoirs in Tahe Oilfield buried deep, strong heterogeneity, fracture-cave unit formed by tectonicmovements superimposed on each other, sew the hole uneven development, the paper will be usetemperature distribution and the distribution of fracture-cave unit comparative studying.Many other factors may cause in the development or production of oil and gas wellstemperature field variation occurs.when the normal conditions of thermal equilibrium is changedthe temperature gradient of the well or the radial direction temperature distribution changes.Temperature logging by measuring the temperature gradient or local temperature anomalies reflectthese changes, to infer what might happen, but most wells in the study area are put on production bythe acid fracturing completion, it is very necessary to study the drilling fluid and acid pressureliquid in borehole temperature changes. In this study, temperature changes caused by alien injectionof liquid into the formation quantitative application need the underground temperature field solution.In the paper, we use the finite element method simulation analysis, simulated fracturing acidtemperature change, dropout liquid temperature change. Established by the simulation of different initial temperatures, different injection volume, different intervals case of acid fracturingfluid/drilling fluid into the formation, the formation temperature the recovery response relationship.Study on reservoir acid fracturing temperature recovery change, can clearly distinguish the horizonsreservoir pressure to open, and the corresponding layers pressure to open degree of relationship.Temperature logging data can also be used to estimate the output of fluid flow. Knownproperties of the fluid mass flow can be obtained by solving the thermal diffusion equation. CreateTahe Oilfield application temperature calculated liquid production model, and given different studyarea for different parameters to calculated. Calculation of liquid production results with actualliquids production was linear. Also in the paper temperature change before well water production isan exploratory study, the water production by oil-producing wells in the study area found that wellproductivity water leading temperature gradually decrease,and with the increasing water productiontemperature drops accelerate, therefore provide a theoretical basis for the oil well produced water totake reasonable mining.