Petroleum Engineering 324 Well Performance Daily Summary Sheet Spring 2009 Blasingame/Ilk. Date: Materials Covered in Class Today: Comment(s):

Transcription

1 Petroleum Engineering 324 Well Performance aily Summary Sheet Spring 2009 Blasingame/Ilk ate: Materials overed in lass Today: omment(s):

2 imensionless Parameters: p kh 141.2qB μ Δp t k t (or Δt) φμc r 2 t w φ hc s t r 2 w

3

4

5 Given: These attached data were taken from a pressure buildup test performed on an oil reservoir the reservoir is assumed to be homogeneous. Reservoir properties: φ0.30 h59 ft r w 0.28 ft c t 3.67x10-5 psia -1 Oil properties: B1.625 RB/STB μ0.39 cp Production parameters: q1000 STB/ t p 1000 hr

6 WBS istortion IARF WBS omination

7 (p ) MP 1 (Δp) MP xx psi ( e 2s ) MP 10 6 WBS istortion IARF WBS omination (t ) MP 1 (Δt) MP xx hr

8 (p ) MP 1 (Δp) MP 300 psi ( e 2s ) MP 10 6 WBS istortion IARF WBS omination (t ) MP 1 (Δt) MP 0.54 hr

9 MP MP ] [ ] [ p p h qb k Δ μ MP MP 2 ] / [ ] [ w t t t r c k Δ φμ w t s r hc φ Parameters From Type urve Match: s e s MP 2 ] [ ln 2 1

10 One staple here. Name: Section: ate: Petroleum Engineering 324 Well Performance Exercise Problem 11 Analysis/Interpretation for a Pressure Buildup Test Assigned: 23 March 2009 ue: 25 March 2009 [to be submitted in class] Assignment oversheet (This sheet must be included with your work submission) Required Academic Integrity Statement: (Texas A&M University Policy Statement) Academic Integrity Statement All syllabi shall contain a section that states the Aggie Honor ode and refers the student to the Honor ouncil Rules and Procedures on the web. Aggie Honor ode "An Aggie does not lie, cheat, or steal or tolerate those who do." Upon accepting admission to Texas A&M University, a student immediately assumes a commitment to uphold the Honor ode, to accept responsibility for learning and to follow the philosophy and rules of the Honor System. Students will be required to state their commitment on examinations, research papers, and other academic work. Ignorance of the rules does not exclude any member of the Texas A&M University community from the requirements or the processes of the Honor System. For additional information please visit: On all course work, assignments, and examinations at Texas A&M University, the following Honor Pledge shall be preprinted and signed by the student: "On my honor, as an Aggie, I have neither given nor received unauthorized aid on this academic work." (Page 1 of 6) Aggie ode of Honor: An Aggie does not lie, cheat, or steal or tolerate those who do. Required Academic Integrity Statement: "On my honor, as an Aggie, I have neither given nor received unauthorized aid on this academic work." (Print your name) (Your signature) oursework opyright Statement: (Texas A&M University Policy Statement) The handouts used in this course are copyrighted. By "handouts," this means all materials generated for this class, which include but are not limited to syllabi, quizzes, exams, lab problems, in-class materials, review sheets, and additional problem sets. Because these materials are copyrighted, you do not have the right to copy them, unless you are expressly granted permission. As commonly defined, plagiarism consists of passing off as one s own the ideas, words, writings, etc., that belong to another. In accordance with this definition, you are committing plagiarism if you copy the work of another person and turn it in as your own, even if you should have the permission of that person. Plagiarism is one of the worst academic sins, for the plagiarist destroys the trust among colleagues without which research cannot be safely communicated. If you have any questions about plagiarism and/or copying, please consult the latest issue of the Texas A&M University Student Rules, under the section "Scholastic ishonesty." Zero Tolerance Policy: You MUST submit this assignment in class ONLY.

11 Introduction: Name: Section: ate: Petroleum Engineering 324 Well Performance Exercise Problem 11 Analysis/Interpretation for a Pressure Buildup Test Assigned: 23 March 2009 ue: 25 March 2009 [to be submitted in class] This problem consists of a pressure buildup test performed on an oil well. Be sure to perform all analyses and label each event. Given: These attached data were taken from a pressure buildup test performed on an oil reservoir the reservoir is assumed to be homogeneous. Reservoir properties: φ0.30 r w 0.28 ft c t 3.67x10-5 psia -1 h59 ft Oil properties: B1.625 RB/STB μ 0.39 cp Production parameters: q o 1000 STB/ t p 1000 hours Required: Pressure Buildup Analysis you are to estimate the following parameters: Part a Early Time Analysis Preliminary Log-log Analysis: (Use the Δp' data on the log-log plot) Wellbore storage coefficient, s 0.12 RB/psia Formation permeability, k 4.85 md artesian Analysis: (Early Time ata) Pressure at the instant of shut-in, p wf (Δt0) psia Wellbore storage coefficient, s 0.12 RB/psia Part b Middle Time Analysis (Permeability and Skin Factor) Semilog (Δt) Analysis: (IARF Infinite-Acting Radial Flow) Formation permeability, k 4.85 md Skin factor, s 0.39 dimensionless Semilog (Horner) Analysis: (IARF Infinite-Acting Radial Flow) Formation permeability, k 4.85 md Skin factor, s 0.39 dimensionless (Page 2 of 6) Zero Tolerance Policy: You MUST submit this assignment in class ONLY.

12 Name: Section: ate: Part a Early Time Analysis Petroleum Engineering 324 Well Performance Exercise Problem 11 Analysis/Interpretation for a Pressure Buildup Test Assigned: 23 March 2009 ue: 25 March 2009 [to be submitted in class] Preliminary Log-log Analysis: (Use the Δp' data on the log-log plot) Wellbore storage coefficient, s 0.12 RB/psia Formation permeability, k 4.85 md (You MUST show all work and clearly identify/label ALL features) (Page 3 of 6) Work Space: Wellbore Storage oefficient, s : qb (1000 STB/) (1.625 RB/STB) s 0.12 RB/psi 24mwbs 24 (580 psi/hr) Permeability, k: qbμ 1 (1000 STB/) (1.625 RB/STB) (0.39 cp) 1 k md h [ Δp' ] IARF (59 ft) (157 psi) (m sl is calculated from the log-log plot m sl ln(10) x Δp' rf Δp' rf psi) Zero Tolerance Policy: You MUST submit this assignment in class ONLY.

13 Name: Section: ate: Petroleum Engineering 324 Well Performance Exercise Problem 11 Analysis/Interpretation for a Pressure Buildup Test Assigned: 23 March 2009 ue: 25 March 2009 [to be submitted in class] Part a Early Time Analysis artesian Analysis: (Early Time ata) Pressure at the instant of shut-in, pwf(δt0) Wellbore storage coefficient, s 0.12 (You MUST show all work and clearly identify/label ALL features) psia psia Work Space: Wellbore Storage oefficient, s: s (1000 STB/) (1.625 RB/STB) qb 0.12 RB/psi 24m wbs 24 (580 psi/hr) mwbs is forced from the log-log plot. Pressure at the instant of shut-in, pwf(δt0) p wf (Δt 0) psia Zero Tolerance Policy: You MUST submit this assignment in class ONLY. (Page 4 of 6)

14 Name: Section: ate: Petroleum Engineering 324 Well Performance Exercise Problem 11 Analysis/Interpretation for a Pressure Buildup Test Assigned: 23 March 2009 ue: 25 March 2009 [to be submitted in class] Part b Middle Time Analysis (Permeability and Skin Factor) Semilog (Δt) Analysis: (IARF Infinite-Acting Radial Flow) Formation permeability, k 4.85 md Skin factor, s 0.39 dimensionless (You MUST show all work and clearly identify/label ALL features) (Page 5 of 6) Work Space: Note: m sl is forced from the log-log plot. Permeability, k: qbμ (1000 STB/) (1.625 RB/STB) (0.39 cp) k md mslh ( psi/cycle) (59 ft) Skin Factor, s: p ( 0) ws,1hr pwf Δt k s log m 2 sl φμct rw (2898 psia) ( psia) (4.85 md) s log ( psi/cycle) (0.3) (0.39 cp) (3.67x10 5 psi 1 ) ( ft) 2 s 0.39 Zero Tolerance Policy: You MUST submit this assignment in class ONLY.

15 Name: Section: ate: Petroleum Engineering 324 Well Performance Exercise Problem 11 Analysis/Interpretation for a Pressure Buildup Test Assigned: 23 March 2009 ue: 25 March 2009 [to be submitted in class] Part b Middle Time Analysis (Permeability and Skin Factor) Semilog (Horner) Analysis: (IARF Infinite-Acting Radial Flow) Formation permeability, k 4.85 md Skin factor, s 0.39 dimensionless (You MUST show all work and clearly identify/label ALL features) (Page 6 of 6) Work Space: Note: m sl is forced from the log-log plot. Permeability, k: qbμ (1000 STB/) (1.625 RB/STB) (0.39 cp) k md mslh ( psi/cycle) (59 ft) Skin Factor, s: p ( 0) ws,1hr pwf Δt t p k s log log m 1 2 sl t p + φμct rw (2898 psia) ( psia) (1000 hr) (4.85 md) s log log ( psi/cycle) (1000 hr) (0.3)(0.39 cp) (3.67x10 psi ) (0.28 ft) + s 0.39 Zero Tolerance Policy: You MUST submit this assignment in class ONLY.