The High Porosity And Permeability Sandstone Reservoirs In Blocking The Acid Associated Technical Studies,

Acidizing treatment and water shutoff treatment have respective limitation, Water Shutoff?Acidizing Joint Operation Technology can satisfy the demand of practice, which is a joint way we have water shutoff treatment first and acidizing after water shutoff agent formed colloidal. This paper making a research about high intensity plugging agent system, selective injecting technology ,the mechanism of stimulation ,mathematical stimulation ,mechanism of plugging and acidizing ,it provided some experiences for the similar conditions in the whole world .the application of research accomplishments had gained a remarkable economic beneficialresult .there is the groundwork that the thesis finishes: It is important to make the causes of water exit clear, and take corresponding operations. The causes of water exit directly deciding the understanding of reservoir, affecting the effect of developing, and deciding the development plan. Certainly, it is important to study the plugging mechanism for selecting suitable plugging agent. On the basis of mastering causes of water exit and mechanism of plugging, develop a system of SPA-031 which consist of acrylamide and aldehyde, studying chemical mechanism, appraise the affecting of gelling time and intensity for main agent, different kind of addictive, and temperature. Making a research for the mechanism of plugging and acidizing ,developing a kind of plugging agent, studying the selective plugging technology, optimizing the acid formula and acidizing design ,the practical plugging and acidizing technology is formed. Making a Research the mechanism of stimulation is a basic content for sandstone reservoirs with high porosity and high permeability ,wbich is also a theoretical basis for optimization of acidizing ,which can also improving the level of technology and which can also improving the level of technology and which is also a basis for acidizing design. The water plugging and Acidizing effects not only lie on the understanding of the reservoir, the characters of plugging agent and acid fluid, technique standards, but also lie on the operation and design standards. In order to improve success rate, the scientific design method of water plugging and Acidizing simulation should be taken.The corresponding acid diverting software had been developed, and lots of simulation experiments had been taken. So this system had become the important technique which made Acidizing treatment successful and safe and ensure Acidizing effect in the sea.