发明名称 |
METHOD FOR DETERMINING FORMATION INTEGRITY AND OPTIMUM DRILLING PARAMETERS DURING DRILLING |
摘要 |
A method for determining formation integrity during drilling of a wellbore includes determining an annulus fluid pressure in a wellbore during drilling thereof. The annulus pressure is adjusted by a predetermined amount. Flow rate of drilling fluid into the wellbore is compared to drilling fluid flow rate out of the wellbore. A formation pore pressure and/or a formation fracture pressure is determined from the annulus pressure when the compared flow rates differ by a selected amount. The method alternatively to determining pore and/or fracture pressure includes determining a response of the wellbore to the adjusted fluid pressure and determining the optimum annulus fluid pressure from the wellbore response. |
申请公布号 |
EA023468(B1) |
申请公布日期 |
2016.06.30 |
申请号 |
EA20110070748 |
申请日期 |
2009.12.02 |
申请人 |
PRAD RESEARCH AND DEVELOPMENT LIMITED |
发明人 |
SEHSAH OSSAMA, RAMZI |
分类号 |
E21B21/00 |
主分类号 |
E21B21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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