利用长水平井实现超薄层未动用储量有效开发OA

Due to factors such as thin effective thickness,single oil bearing layer,poor reservoir properties,and low single well production,the Lishuao block in the Xiaermen Oilfield of the Biyang Sag has low utiliza-tion of proven reserves and poor development effects.In order to improve the reserve utilization in the area,the technology for horizontal well development is promoted and the exploitable potential is further realized by strengthening the reservoir geology study.In the process of geological-engineering,the technology for multi-target+near-bit azimuth gamma is used to strictly control the horizontal section trajectory,and the drilling coincidence rate is improved.By optimizing the perforation well section,the single well production has been improved,gradually forming a set of development techniques suitable for long horizontal wells in oil reservoirs with thin layers in Henan Oilfield.The on-site implementation results show that the horizontal section length of the horizontal well is 892 m,with 100%for reservoir drilling and 91.4%for oil reservoir drilling,and the initial daily oil production is 14.1 t.The successful horizontal wells implementation in this block points out the direction for tapping the potential of ultra-thin oil reservoirs and has a good guiding reference for the effective development of unutilized reserves in Henan Oilfield.