Geological Interpretation Of Well Logs In The Zhongtan9and Zhong30Blocks Of Fuyu Oilfield

Fuyu oilfield in Zhongtan9, Zhong30blocks are mainly for the development purposesFuyang reservoir layer. It has many faults, complex fracture system, relatively shallow oilreservoir depth, most oil layer distributed on structural highs, more and thin oil reservoirs，more different physical property. The Zhongtan9, Zhong30blocks already belong to theproduction tail of high water, relatively low recovery, facing a severe development situation.As we have begun to describe the sublayer of the reservoir, but the remaining oil in a smalllayer of cells is difficult to meet the current demand for fine tapping and requires internalanatomizing features of a small layer of sand. Therefore, geological study based on reservoirlevel monosandbody fine reservoir description and logging interpretation is needed.In order to fine reservoir description of the study area, this paper on the basis of buildingthe interpretation model, useful wells in Zhongtan9, Zhong30blocks were fine interpretationof logging, and barrier and interbed are fine identification. Then on the basis of sequencestratigraphy theory, according to the principle of "cycle contrast, hierarchical control",combining with regional marker bed, we can divide and contrast levels mesaures. On thebasis of layers division and correlation, we studied the monosandbody, then analysed andclassified the overriding patterns of the monosandbody and same time but different causesmonosandbody plane. On the basis of monosandbody divided, the physical protertiy and thedistribution of barrier and interbed are researched. Finally, combining monosandbodydistribution, the fine interpretation logging and the distribution of interlayers to calculate thestudy area reserves.Summed up by research: monosandbody plane identification of six boundaries and sixspace contacting relationships; the interbed of identification standards are GR greater than16%return and RLLD greater than17%return; the barrier of identification standards are GRgreater than84.5API; microelectrode amplitude difference less than0.2; the average porosityof the study area is23%and average permeability of the study area is230×10-3μm2; thereserves for the study area is1025.1×104t.