Well Yong 66-41 is a key well of structural high in Block Yong 66 of Yongan Oilfield.

A series of problems existed in Leng 41 block during the development of super heavy oil reservoir, such as serious bottom water coning and so on.

After being developed with vertical well patterns during the past decade,the Leng 41 block of Liaohe oil field,as the typical heavy oil reservoir with edge and bottom water,became degraded with the energy,serious with bottom water coning and worse with development condition,which led to the serious reduction of recovery ratio and much more oil remaining underground.

Study on oil recovery technique for deep super - heavy oil reservoir in fault block Leng 41;

Based on cyclic steam stimulation history of deep super- heavy oil in fault block Leng 41, this paper analyzes reservoir production feature and affecting factors by using dynamic and reservoir engineering method, and also proposes matching techniques, thus providing reference to development of similar reservoirs in the future.

Leng66-Pingl well is the first horizontal exploration well in Leng66 area, only a few reference wells , and the distance among these wells is so far , besides, the uncertainty of reservoir depth is relatively high , so it makes drilling and geological tracking very difficult.