The Planning Method For Typical Reservoir Development In Tarim Oilfiled

Oilfield development planning is a comprehensive system consisted of series technical measures and production management decisions.It is of significant importance to realize the development situation of the oilfield,to study the development trend,to analyze the development potential and to achieve the longterm production goals.Tarim Oilfield is a crucial oil&gas production area,with various oil products,complicated reservoir type and versatile formation categories.Therefore,to strengthen the basic research planning and establish the key technologies method system of development planning is crucial to the oilfield development planning compilation of Tarim oilfield.Based on the study of different methods to calibrate the recoverable reserve of condensate gas reservoir,this thesis proposes a period division method of rolling calibration condensate oil recoverable reserves which is applicable for the cyclic gas injection condensate gas reservoir.After verified by comparing with numerical simulation and condensente oil content depletion method,this new method is used to calibrate the recoverable reserve of condensate oil in E+K cycle gas injection development unit in X condensate gas resrvoir.After that,taking different clasolite and carbonate blocks in Tarim oildield as examples,the main characteristics,varistion laws and value range of different production-construction indexes are analysed.At last,according to the different characteristics of short-term,middle term and long-term planning in Tarim oilfield,annual production compositon method,five-year production composition method and reserve-production ratio control method are used to calculate the production compositon of new wells,old wells without mesures and wells with measures.The result shows that the condensate oil recovery of E+K development unit in X condensate gas reservoir is 60%and the recoverable reserve is 1172.64×10~4t.The development of old sandstone reservoir has a good consistency with the natural law of oilfield development,which shows that the adjustment potential and the effectiveness in middle and later periods of the crude oil development would be worse year by year.Affected by the collective scales and the heterogeneity,the new carbonate reservoir has the characteristics of high productivity in early period and then turn into rapid depletion.The average completion rate of production capacity,rate of contribution and rate of reaching the designed value are86%,54%and 85%,these three factors are mainly influenced by new well successfully producted ratio,single-well production rate and depletion rate.The shortterm production composition rate of new wells,old wells without mesures and wells with measures is 12%,82%and 6%accordingly.The depletion pattern of longterm planned old wells and new wells are both exponential pattern,with initial depletion rate of 17.5%and 20.4% accordingly.