Experimental Study of The Scale of Cement Sample’s Damage and Fracture Zone by Exploding Wave
|School||China University of Petroleum|
|Course||Oil and Gas Well Engineering|
|Keywords||Layer explosion Cement samples Attenuation law Experimental study Energy Analysis|
Reserves account for about half of the total reserves of low- permeability reservoir , one of the main target for future exploration , development . Draw lessons explosive oil wells , and draw on the successful experience of the high-energy gas fracturing , hydraulic fracture stimulation technology to yield new technology for low permeability reservoir layer explosion \The technology can improve oil recovery , thus improving the penetration rate of the oil to increase the economic benefits of the oil field . This article is a low permeability reservoir stimulation technology of indoor simulation study , using water explosives interface explosion damaged saturated cement samples damage experiment to simulate the \In this thesis through the optimization of the experimental program and analysis of experimental phenomena observed and described before the explosion , after the cement sample morphology . Confirmed the the prefabricated crack profiles can be approximated on behalf of internal cracks of the cement sample , and to infer the law of internal damage and failure of the cement samples . Through the sample the Nate designated the record shock under pressure , preliminary fit under the test conditions , the the cement sample internal shock attenuation law . The empirical formula of dimensional analysis of the experimental samples after crushing area , the scale of the damage and fracture zone crushed zone radius and shock pressure and tensile fissure length of the damage zone with the shock pressure . And found that the crush zone, stretching a characteristic scale of the damage area are approximately 2 to 5 Zong concentrated kits scale and 20 to 30 , Zong . Shock energy consumption in cement samples crushed and crack accounts for about 2% of the of explosives total energy to 7 % .