Font Size: a A A

Study On The Recognition Of Fracture-Vuggy Carbonate Reservoir And Fluid Along With Its Appraisal

Posted on:2008-01-23Degree:DoctorType:Dissertation
Country:ChinaCandidate:Y J YangFull Text:PDF
GTID:1100360215469340Subject:Oil and gas field development project
Abstract/Summary:PDF Full Text Request
The most protruding question of carbonate reservoir are extremely strongunhomogeneity and dual porosity model characteristics. The Tahe reservoirOrdovician carbonate rock belongs to the type reservoir that this is special. Thecarbonate reservoir rock includes many influence factors that it is through manyphases structure bursts and the ancient karst to act on jointly the formation and withwhich the rock karst gives first place. The complicated oil field of karst cave andcrack are controlled by limestone reservoir and the crevices-cave system, which havemany characteristics such as vivid and great in style, irregular distribution, thelimestone cave in crack and unhomogeneity of rock etc. These kinds of reservoirbelong to a world difficult and extreme problem on valuation and cognition.1. Unified the analysis of static and dynamic material in Tahe oil field, carbonaterocks reservoir with hole will be separated into three kinds: the cavern, the crack -hole and the crack. The 4, 6 areas of Tahe oil field respectively choose certain sampleof well sections, and the result of synthesis distinguish for the coincidence rate above80%.2. Based this reservoir type foundation, many kinds of methods are used todivide fluid nature, and confirms with the material of test, production, and so on. Theoverall judgement rate is also high, and the methods are proved to be really useful andfeasible.3. The certain relations that the porosity of carbonate rocks nuclear magneticlogging and the porosity of core sample analysis does not same good with sandstone.The main reason is that the carbonate rocks hole nuclear magnetism surface relaxationspreads in a big way and the hole the nucleon relaxation speed obviously compares tothe sandstone quickly. The instrument signal to noise ratio insufficiently is high, thecarbonate rocks effective pore width lower limit correspondencing spreads relaxationtime T2 falls in the instrument death time. The effect with oil well logging is not ideal.When, boring sample only can take the low hole the rock sample. It is very difficult tothe sample the core of the crack and dissolved the hole growth the position. So, theanalysis porosity is basically matrix porosity.4. Based of the nuclear magnetism porosity and the moving fluid porosity, loginformation of electronic resistivity and so on, the quantitative interpretation about theoil gas degree of saturation in the reservoir may carry on according to the certain well logging interpretation model. Then, a kind of new oil well logging and distinctionmethod for the oil (gas) has provided for the level appraisal.5. The well logging interpretation is thatⅠ,Ⅱkind of reservoir thickness invertical has the tendency from on to under which is gradually decreases. The 4 areareservoir of Tahe oil field mainly distributes above next 200~260m under weatheringplane, and the Tahe 6 area reservoir mainly distributes above next 300~350m underweathering plane.6. According to the three dimensional geological modelling in 4, 6 areas of Taheoil field reservoirs, many kinds of stochastic modellings method will be simulated themodel result and the actual situation contrast analysis. Finally the Sequential IndicatorSimulation and the Sequential Gaussion Simulation have been determined to simulatethe reservoir model and the attribute model and these mothods will establishapproaches to the real stratum. The advantageous reservoir growth spot plane willdisplay the obvious uniformity with the local structure high spot From the model.Ⅰ,Ⅱreservoir thickness will have the tendency by on to under which will graduallydecrease in on longitudinal. Reservoir distribution will have the seriousunhomogeneous on the crosswise and the thickness is not obvious rule to seek. So theexplained reservoir is controled by the growth obviously the distortion degree ofstructure and the karst function.
Keywords/Search Tags:Tahe oil field, 4,6 area, reservoir recognition, fluid recognition, reservoir modeling
PDF Full Text Request
Related items