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随注水开发的深入，三间房组油藏产液呈现出含水上升、产量下降、注采关系长期不平衡的现状。分布于主河道砂体中的油井砂层厚、物性好、单井初产高、采出程度大、油层压降也大。注水开发中，注入水主要沿砂体延伸方向向压降大、物性好的油井突进。受沉积旋回控制，油藏中的Ⅰ，Ⅱ类储层多分布于每一油层组的中、下部，即第３或第４小层。这些小层产液量高、吸水强度大，造成开发中多为单层、单向含水上升。在油藏内，注入水主要是沿砂体展布方向由西向东、由低渗向高渗形成主渗通道。油藏产液量的变化与注水效果关系直接，主力产区含水上升是导致油藏产量下降的主要原因。
With the deepening of waterflood development, the oil production in the Sanfangfang Formation shows a rising water cut, a decrease in production, and a long-term unbalanced relationship between injection and production. The oil sand well distributed in the sand body of the main channel is thick and has good physical properties. The single well is initially produced with high yield and the pressure drop in the reservoir is also large. Water injection development, injection of water mainly along the sand body extending direction to the pressure drop, well-natured oil well. Controlled by sedimentary cycles, reservoirs of type I and type II are distributed in the middle and lower parts of each oil layer group, ie, the 3rd or 4th sub-layer. The production of these small high-volume, water absorption strength, resulting in the development of mostly single-layer, one-way moisture rise. In the reservoir, injected water is mainly distributed along the sand body from west to east, from low permeability to high permeability to form the main infiltration channel. The relationship between the change of oil production and the effect of water injection is direct. The increase of water content in the main producing areas is the main reason for the decrease of oil production.