The Technology Research Of Side-tracking Cementing In The Complex Formation Pressure Area Of DaQing Oil Out-ring Field

Using polymer injection in recent years, daqing oilfield development, high formation pressure, local area due to surface water, shallow gas and cementing cementation quality is bad and so on a variety of reasons, some production Wells in various complex accident, oil field many blocks such as chaoyang south ditch oilfield, Portugal oilfield drilling of development well and adjustment well and update well, such as pipe outside risk and channeling problem respectively, the earth’s surface appear many hole, hole and fracture, and so on and so forth, direct to take oil, gas, water and sand, rock and the upper formation waters were under a lot of complicated cases, interfere with the oilfield hierarchical development, surrounding environment pollution oilfield, workover construction period delay, an urgent need to secondary cementing or sealing channeling management, increased the governance cost.Oilfield water injection development, oil and water Wells casing damage increased year by year, the harm of oil field development. Oil and water Wells casing damage increased, on the one hand, to expand the market space of the lateral oblique workover, on the one hand, also the contralateral inclined workover cementing quality put forward higher requirements. Late oilfield development comprehensive moisture content over 80%, oil field the main subjects for residual oil is scattered difficult to development, with a thin layer of low permeable reservoir poor thin reservoirs and low degree of heavy oil reservoir in the inland waters flooded areas, as a result, the cementing quality is very important to determine development horizon, perforation scheme. With the deepening of the study of fine geology, thin oil layer gradually into development, overall improve the cementing quality will no doubt to the injection-production system adjustment, stable oil water control, the layer within the salt, provide reliable basis to improve oilfield development economic benefits.In order to further improve the cementing quality of adjustment Wells, poor reservoirs of daqing oilfield is low permeability thin abnormal high pressure, the major reservoir under voltage, large pressure difference between the layers of contradictions, carried out to improve cementing quality of adjustment Wells technology research. The factors affecting the cementing quality of adjustment Wells, on the basis of careful analysis, studied the adjustment well drilling formation pressure testing technology, after the implementation of the drilling formation pressure, the quantitative real-time detection; Adopted the annulus pressure compensation, DPDR cement slurry system four supporting technology, such as the abnormal high pressure anti channeling well cementing, high permeability of low pressure layer leakproof cementing complex Wells, such as improving cementing quality field test.