塔北哈拉哈塘地区蓬莱坝组储层地震特征及勘探方向

Seismic characteristics and exploration direction of Penglaiba formation reservoir in Halahatang area of northern Tarim basin

塔北地区中、下奥陶统以及寒武系深层白云岩勘探程度低。为了寻找该区碳酸盐岩新的勘探领域,开展以岩性、地震资料为基础的地震相识别及沉积相带划分,在塔北地区下奥陶统蓬莱坝组识别出蒸发台地、局限到开阔台地等沉积相带,以及对应的岩溶区带。通过储、盖综合分析评价,认为局限到开阔台地相的储层,在混合水、断控岩溶的共同作用下产生溶蚀孔洞,具有良好的储盖组合,具备规模勘探的基础,是下步勘探的接替领域。

The exploration degree of deep dolomite in middle and lower Ordovician and Cambrian in Tabei area is low.In order to find a new exploration area for carbonate rocks in this area,seismic facies identification and sedimentary facies belt division based on lithology and seismic data are carried out.In the lower Ordovician Penglaiba formation of Tabei area,sedimentary facies belts such as evaporation platform,limited to open terraces,and corresponding karst zones are identified.Through the comprehensive analysis and evaluation of reservoir and cap rock,it is considered that under the joint action of mixed water and fault controlled karst,the carbonate rock in the limited to the open terraces facies which influenced by later mixed water and faultcontrolled karst has good reservoir and seal conditions,which has the basis of large-scale exploration,and it is the next exploration area.