河南泌阳特超稠油储层水淹层测井解释

河南浅层特超稠油油层成岩程度低,储层松散,具有孔隙度大、渗透率高、含油饱和度高的特点.蒸汽吞吐过程中油层出砂严重,蒸汽吞吐后水淹层岩心和电性特征变化明显,依据岩电关系的研究,建立了一套快速、直观的水淹层定性和定量测井解释的声波时差-深侧向电阻率图版解释法、神经网络技术识别方法、C/O比能谱测井解释法.经过河南稠油油田39口井的验证,水淹层解释符合率达89.7%.

Logging Interpretation for Water Flooded Zone in Super-heavy Oil Reservoir of Henan Biyang Depression

In Henan oilfield, the heavy oil reservoir has shallow depth, high viscosity, and unconsolidated formation with high porosity, high permeability and high oil saturation. There are a large amount of sands produced during steam stimulation. The characteristics of core and electrical properties of water flooded zones have changed visibly. So, based upon the study on the relationship between the cores and logging curves, a set of fast and intuitive techniques has been set up to interpret the water flooded zone qualitatively and quantitatively, which includes identifying the water flooded zone by using plot of the sonic transit time and the lateral logging data and the technology of artificial neural networks; and measuring the flooding degree according to C/O curves. The log application in 39 wells of Henan heavy oil field confirms that the coincidence rate of the water flooded zone interpretation reaches 89 7 percent.