锦州25-1南X井区潜山油气藏精细评价技术与实践

Fine Evaluation Technology and Practice of Buried Hill Reservoir in Jinzhou 25-1South X Well Area

锦州25-1南是渤海首个规模性潜山油气藏开发油田,目前已累计投产36口井,是渤海最大的生产潜山裂缝性油藏。随着勘探区域的不断扩大及勘探井网的多次加密,在精确判定潜山内幕带优势储层发育位置及流体界面等问题上仍存在诸多困扰。依托该区域已钻井及围区新增勘探井为数据体,通过对已钻井的随钻气测、工程参数及地化录井等数据进行深入分析,引入储层评价系数,建立参数模型及评价图版,实现了储层快速评价及潜山流体类型的识别。该方法成功实现了锦州25-1南太古界潜山评价目标,X井区油底加深136 m,同时该方法为后续渤海油田锦州25-3区块及渤中26-6区块太古界潜山综合高效开发评价提供关键技术支持。

Jinzhou 25-1 South area is the first large-scale buried hill oil and gas reservoir development oilfield in Bohai Sea.Currently,36 wells have been put into production,and it is the largest buried hill fractured oil and gas reservoir in production in Bohai.With the continuous expansion of exploration area and multiple encryption of exploration well network,there are still many problems in accurately determining the development position of dominant reservoirs in the inner zone of buried hill and the direction of fluid interface research.Based on the data body of the drilled wells and the new exploration wells in the surrounding area,through the in-depth analysis of the driled gas while drlling,engineering parameters and geochemical logging data,the reservoir evaluation coefficient is introduced,the parameter model and the evaluation map are established,and the rapid evaluation of the reservoir and the identification of the buried hill fluid type are realized.This method successfully achieved the evaluation target for Jinzhou 25-1 south archaean buried hill,and the oil bottom of well X area was deepened by 136 m.At the same time,this method provides key technical support for subsequent comprehensive and efficient development evaluation of Archaean buried hill in Jinzhou 25-3 block and Bozhong 26-6 block in Bohai oilfield.