Hydraulic fracturing using petroleum coke
阅读：93发布：2022-06-23
专利汇可以提供Hydraulic fracturing using petroleum coke专利检索，专利查询，专利分析的服务。并且A fluid containing suspended particles of petroleum coke is injected into a fracture formed in a subterranean formation. The injection conditions are such that the coke particles are carried to the ends of the fracture where they screen out and form low permeability zones. Continued injection of a fluid produces an increase in fracture pressure increasing the dynamic width of the fracture.，下面是Hydraulic fracturing using petroleum coke专利的具体信息内容。
1. A method for the hydraulic fracturing of a subterranean formation surrounding a well which comprises injecting a fluid containing suspended particles of petroleum coke into a fracture in said formation, a major portion of said particles of petroleum coke being between 50 and 200 mesh in size; and thereafter injecting a fluid containing suspended propping agent particles substantially larger than said particles of petroleum coke into said fracture.
2. The invention as recited in claim 1 wherein said petroleum coke is fluid coke.
3. A method as recited in claim 1 wherein the concentration of said propping agent particles is from about 1 to about 20 pounds per gallon of the second recited fluid.
4. A method as defined by claim 1 wherein the concentration of the particles of petroleum coke is greater than 100 pounds per barrel of said the first recited fluid.
5. A method as defined by claim 1 wherein the volume of said suspended particles of petroleum coke injected into the fracture is sufficient to form beds having a length measured from the fracture end towards the wellbore of at least 10 feet.
6. A method for the hydraulic fracturing of a subterranean formation surrounding a well which comprises injecting a fluid containing suspended particles of petroleum coke into a fracture in said formation, a major portion of said particles being between 50 and 200 mesh in size, displacing the fluid containing said suspended particles in said formation until said particles reach the ends of the fracture, injecting a fluid containing suspended propping agent particles substantially larger than said particles of petroleum coke into said fracture, and thereafter closing in the well to permit the formation to close on said propping agent particles.
7. A method as defined by claim 6 wherein the step of displacing the fluid containing the suspended particles of petroleum coke is performed by injecting a fluid substantially free of suspended solids into the fracture.
8. A method as defined by claim 6 wherein the composition of said fluid containing said suspended particles of petroleum coke and the composition of the fluid for displacing said fluid containing said particles of petroleum coke are substantially the same.
9. A method for the hydraulic fracturing of a subterranean formation surrounding a well which comprises injecting a fluid into said well at a rate sufficient to open and propagate a fracture in said formation, introducing a fluid containing suspended particles of petroleum coke into the fracture, a major portion of said particles of petroleum coke being between 50 and 200 mesh in size, injecting a fluid containing suspended propping agent particles substantially larger than said particles of petroleum coke into said fracture, and thereafter closing in the well until said fracture has closed on said propping agent particles.
10. A method as defined by claim 9 wherein said fluid containing said suspended particles of petroleum coke is a water-base fluid containing a gelling agent.
11. A method as defined by claim 9 wherein a fluid substantially free of coke and propping agent particles is injected into said fracture between said fluid containing said suspended particles of petroleum coke and said fluid containing said suspended propping agent particles.
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