后效射孔-英文-新.ppt

Aftereffect Perforation Advantages Stable Property Aftereffect body is specially-made polymer without exploding basis source: under high temperature, its physical and chemical properties are stable: under low temperature, it will not become brittle or invalid; immerged in oily water, it will not become dangerous. With characteristics of high temperature resistance and impact resistance, it is safe and environment friendly during transportation, storage and site operation. Aftereffect Perforation Advantages Safe Operation Aftereffect body and regular perforation bullet are coaxial integrated appliances, after regular perforation bullet detonating, the aftereffect body is detonated, its energy is carried on main jet, instantly acts on reservoir space, which can maintain or decrease annular pressure inside gun all over the perforation process so as to effectively avoid gun exploding or sticking. * Increasing annular pressure Traditional enhanced perforation Aftereffect perforation Decreasing annular pressure Aftereffect Perforation Advantages Healthy and Environment Friendly Aftereffect body doesn’t contain radioactive substances or flammable explosive ingredients. After operation, it will not leave any residue so that it will not cause any pollution to borehole, reservoir and ambient environment. Aftereffect Perforation Application Cases Well completion of CNOOC Tianjin Branch Bohai HK block adopts perforation and production pipe column combination technology, after perforation they do not lift gun but produce directly. The perforation layer is sand 2nd section of Shahejie Formation, average porosity 16.3%, average permeability 42.7md, perforation section 3546-3589.3m, net perforation depth 27.9m. Using 430 sets type 127 aftereffect body, production after perforation reaches 300m3/d, far more than estimated production 70m3/d. Aftereffect Perforation is upgrading technology production of cluster perforation Bozhong certain well, most of reservoir in perforat