Method and apparatus and program storage device adapted for automatic qualitative and quantitative risk assessment based on technical wellbore design and earth properties

• US 7,653,563 B2
• Filed: 03/17/2004
• Issued: 01/26/2010
• Est. Priority Date: 03/17/2004
• Status: Expired due to Fees

• Current Assignee: Schlumberger Technology Corporation (SLB)
• Original Assignee: Schlumberger Technology Corporation (SLB)
• Inventors: Givens, Kris, Veeningen, Daan
• Primary Examiner(s): DeCady; Albert
• Assistant Examiner(s): ROBERTSON, DAVID
• Application Number:
  US10/802,524
• Publication Number:
  US 20050228905A1
• Time in Patent Office: 2,141 Days
• Field of Search: 705/7, 705/38, 703/13, 703/17, 367/81, 367/82, 340/853.1, 340/853.3, 340/853.6, 175/24, 175/39, 175/40, 700/36
• US Class Current: 705/7.28
• CPC Class Codes: G06Q 10/0635 Risk analysis of enterprise or organisation activities
• CPC Class Codes: G06Q 40/03 Credit; Loans; Processing thereof
• CPC Class Codes: G06Q 40/08 Insurance

Abstract

A Software System, known as an Automatic Well Planning Risk Assessment Software System, is adapted to determine and display risk information in response to a plurality of input data by: receiving the plurality of input data, the input data including a plurality of input data calculation results; comparing each calculation result of the plurality of input data calculation results with each logical expression of a plurality of logical expressions; ranking by the logical expression the calculation result; and generating a plurality of ranked risk values in response thereto, each of the plurality of ranked risk values representing an input data calculation result that has been ranked by the logical expression as either a high risk or a medium risk or a low risk; generating the risk information in response to the plurality of ranked risk values; and displaying the risk information.

Claims

1. A program storage device readable by a machine tangibly embodying a program of instructions executable by the machine to perform method steps for determining and displaying risk information based on a technical wellbore design and Earth properties, the method steps comprising:

generating a drillstring design for a wellbore in each hole section of the wellbore in response to a required wellbore geometry and a required wellbore trajectory of the wellbore;

receiving input data, the input data including input data calculation results associated with the wellbore;

comparing each calculation result of the input data calculation results with a logical expression;

ranking by the logical expression each of the input data calculation results, and generating ranked risk values extending along a depth of the wellbore in response thereto, each of the ranked risk values representing an input data calculation result that has been ranked by the logical expression as having a risk selected from the group of a high risk severity, a medium risk severity, and a low risk severity;

generating risk information in response to the ranked risk values, the risk information comprising a ranked risk category, a ranked subcategory risk and a plurality of ranked individual risks; and

displaying the risk information, said risk information display including a simultaneous display of said risk information along said depth of said wellbore.

2. The program storage device of claim 1, wherein the risk category is selected from a group consisting of:

an average individual risk, an average subcategory risk, a total risk, an average total risk, a potential risk for a design task, and an actual risk for the design task.

3. The program storage device of claim 1, wherein the subcategory risk is selected from a group consisting of:

gains risks, losses risks, stuck pipe risks, and mechanical risks.

4. The program storage device of claim 1, wherein the individual risks are selected from a group consisting of:

H2S and CO2, hydrates, well water depth, tortuosity, dogleg severity, directional drilling index, inclination, horizontal displacement, casing wear, high pore pressure, low pore pressure, hard rock, soft rock, high temperature, water-depth to rig rating, well depth to rig rating, mud weight to kick, mud weight to losses, mud weight to fracture, mud weight window, wellbore stability window, wellbore stability, hole section length, casing design factor, hole to casing clearance, casing to casing clearance, casing to bit clearance, casing linear weight, casing maximum overpull, low top of cement, cement to kick, cement to losses, cement to fracture, bit excess work, bit work, bit footage, bit hours, bit revolutions, bit rate of penetration, drillstring maximum overpull, bit compressive strength, kick tolerance, critical flow rate, maximum flow rate, small nozzle area, standpipe pressure, ECD to fracture, ECD to losses, gains, gains average, losses, losses average, stuck, stuck average, mechanical, mechanical average, risk average, subsea BOP, large hole, small hole, number of casing strings, drillstring parting, and cuttings.

5. The program storage device of claim 1, wherein the step of generating the risk information in response to the ranked risk values comprises the step of receiving the ranked risk values and calculating the ranked risk categories.

6. The program storage device of claim 1, wherein the step of generating the risk information in response to the ranked risk values comprises the step of receiving ranked risk values and calculating the subcategory risks.

7. The program storage device of claim 1, wherein the step of generating the risk information in response to the ranked risk values comprises the steps of receiving the ranked risk values and using the ranked risk values to represent the ranked individual risks.

8. A program storage device readable by a machine tangibly embodying a program of instructions executable by the machine to perform method steps for determining and displaying risk information based on a technical wellbore design and Earth properties, the method steps comprising:

receiving a plurality of input data calculation results associated with the wellbore;

comparing each calculation result of the plurality of input data calculation results with each logical expression of a plurality of logical expressions to rank the calculation result;

calculating a plurality of ranked individual risks extending along a depth of the wellbore in response to the ranking step, each of the plurality of ranked individual risks representing an input data calculation result that has been ranked by the logical expression as having a risk severity selected from the group consisting of a high risk severity, a medium risk severity, and a low risk severity;

generating risk information in response to the plurality of ranked individual risk; and

displaying the risk information, the displaying step including displaying the risk information on a risk information display, the risk information display including a simultaneous display of the plurality of ranked individual risks calculated along the depth of the wellbore.