Fault Block Heavy Oil Reservoir With Edge Water Steam Injection Development Effect Evaluation To Xinzhuang Oil Field As An Example

The45eara of Xinqian is located in the northeastern of Xinzhang oil field,including the XQ45and XQ75fault block, belonging to the denudation planesheltered craven fault block super heavy oil reservoir which is nose structure. Itsfracture mainly developed in the North East and North West. Oil layer is mainlydistributed at No.3sections of eogene Hetaoyuan. The main layer are H3II2、II3、II5、II6. Three problems exposed in this area during during huff and puff: obvious edgewater incursion, serious steam channeling，unclear remaining oil distribution.In order to understand the structural characteristics (including faultcharacteristics), sedimentary facies and sand body characteristics and reservoircharacteristics, we study on the reservoir geological of the45eara of Xinqian with thetheories of petroleum geology, logging geology, reservoir geology, sedimentology,sequence stratigraphy, and combined with some previous results. According to relatedmaterial and on the basis of deepening the geological understanding, we also researchon develop dynamic analysis of the normal production of cyclic steam stimulationwells according to production time and throughput cycle. To see a side of the watersteam stimulation well, in conjunction with the relevantmaterial to see wateridentification, analysis of the dynamic features and water invasion influence factor,put forward the calculation method about edge water invasion distance and quantity.Numerical simulation on the45eara of Xinqian using the heavy oil in hot numericalsimulation software to make clear the remaining oil distribution and influencingfactors. In summary, the45eara of Xinqian cyclic steam stimulation has the followingcharacteristics:With the turn increase of the production cycle, production of the late integralwater content gradually increased, also showed a high water cut productionfeature in the late of production cycle.Different pay bed has different producing level, different quantity and averagedepth of edge water intrusion.Steam channeling in flakes, showing the characteristics of one gas injection andmore steam channeling. Early in the steam channeling, mainly one–way steamchanneling. With the multiple steam soaks, two-way interaction channeling began toappear. Steam channeling has large area and well quantity. Steam channeling in thesame layer and also in the interlayer. The steam channeling is early and with long timeaffect.Overall, recovery percent is relatively low. High abundance of remaining oilcentered in near faultage and the main part of the local wells area, and showedcontiguous distribution.