Characteristics And Development Techniques Of Chang 9 Reservoir In Huang 219 Well In Jiyuan Oilfield, Ordos Basin

Ji Yuan oilfield located the eastern of the tianhuan depression in the Ordos basin. The reservoir group of Chang9is a new developed series of strata in recent years. Its characteristic is complex structure, fault development, rich bottom water and complex oil-water contact relationships,development of energy decrease rapidly,and the bottom water occurred coning in the process of reservoir development.The study take the huang219area as an example,which is the large scale reservoir in the reservoir group of Chang9.Based on reservoir characteristics and dynamic production,applying the reservoir engineering and numerical simulation,optimizing the technology mode of development. And forming the understand as follow.(1)By the correlation of strata,combined with seismic interpretation results,the top structure of Chang9reservoir in huang219district is nosing structure, which is controlled by east and west faults.The top structure played a certain control action in the reservoir development.Establishing the reservoir formation mode,for example,the nosing structure control the oil, lithology shield the oil,the fault chipping the reservoir.Checked out the oil-water distribution and control factors.(2)The characteristics of the small reservoirs of Chang911as the main layer are good reservoir property, the average porosity of12.8%and the average permeability of3.36×10-3μm2. The reservoir property of small layer of Chang912is good and the local permeability reached32.8×10-3μm2, which can provide channels for bottom water energy supplement.(3) The reservoir group of Chang9exist three kinds of the oii-water contact relationship,including direct contact type,thin interlayer contact type,and steady interlayer separation tye.(4)According to the geological characteristics of different oil wells,by the volume ratio of water to oil,the production index curve,the method of chart,and other reservoir engineering methods.Combined with numerical simulation,framing the reasonable developmet policy of the different oil and water wells.The effection of the application is better.