Tracking Adjustment Method Research Of Horizontal Well-Vertical Well Joint Disposing Wells

As the increased demand for oil - gas and the residual resources decrease og human, the key of oilfeild development has been transformed for the low permeability reservior which is developed badly or which is undeveloped. To realize high-efficiency development of the thin layers of low permeability, many countries attemp to use the technology of the Horizontal well-Vertical well joint development to improve output and recovery ratio. At present, this technology has been relatively mature, countries have entered popularized phase of industrialized scale. Because more and more horizontal wells have been used to extract the low permeability reservior, the related technologies of horizontal wells assail to the thin layers of low permeability reservior gradually, and the technologies of horizontal wells breakthrough to the direction of the low permeability reservior, then the effective technology is formed, and we use this technology to develop oilfield. To sum up, how to use the Horizontal well-Vertical well joint development to develop the thin layers of low permeability reservior has become important direction of improving the recovery ratio.The horizontal well area of M72 in Aonan oilfeild has the character of low permeable and cracks, it mainly develops the P oil layer, the oil layer conditions are poor, and the thickness is little, the scale of reservior sandbody is small, so we use Horizontal well-Vertical well joint development to extract this block. The current development status shows: in the process of Horizontal well-Vertical well joint development, the output declines rapidly without considering heterogeneity and injection measure of different localization in the horizontal section, so this block was been researched.In this article, through analysing and researching the effected character of injection, using multidisciplinary reservoir engineering method and numerical simulation methods, we research the following five aspects combining monitoring results based on the effected condition of the oilfeild, including that: flow normal distrubution characteristics of horizontal well drilling in reservior surrounding, and the effect of the pipe action on the vertical wells surrounding; the effect of different performation localization,included angle of horizontal section and the diatance of injection wells and horizontal wells on water drive effect; the research of different well network area,different reservior bed,reasonable water intake per unit thickness of different localization and the injection flow rate; the research of reasonable injection cycle and plane injection alternate method of injection wells; the research of the effected characters about mearsures of horizontal wells. According to the above results, we optimize an unstable injection adjustment scheme so that the efficient development can be proceed in this block. productivity prediction can be proceed with the numerical simulation method, and the prediction recovery has more 2.7 percent than the original plan.Finally,the caculation method of water drive contral degree can be confirmed using reservoir engineering method combined, so that productivity prediction can be proceed.