Chemical Methods Unit. Vladimir Alvarado Department of Chemical and Petroleum Engineering 07/17/2007

Transcription

1 Chemical Methods Unit Vladimir Alvarado Department of Chemical and Petroleum Engineering 07/17/2007

2 CMU Outline Objective WY context. Chemical Methods Review Data collation and screening Experimental infrastructure Modeling and simulation Activity/Year S F W SP S F W SP S Review report Data-Screening Laboratory Modeling

3 Objective The Chemical Methods Unit will help to fulfill the mission of the Institute through research and service activities by screening traditional and developing new EOR chemical methods. ASP will be used as the paradigm for Chemical Methods. Well conformance or stimulation will be reviewed, but not emphasized.

4 Main Functions of Chemical Additives and Mechanisms in ASP Flooding

5 EORI s Objectives 1 Assist Wyoming operators with their EOR projects by applying existing technologies and creating new knowledge when necessary. Maximize the economic potential and minimize the risk of EOR projects. Facilitate the testing, evaluation, and documentation of EOR recommendations in the real world settings. Transfer the information to Wyoming producers by forming partnerships and conducting workshops and conferences. Develop technologies for capturing CO 2 from flue gases. 1

6 Warner DriscollCreek Enigma WestKiehl Cambridge Tanner ellott anch Adena Sho-VelTum Chemical Floods since 1985* ASP AP Polymer David Etzikom Cessford Thompson Cr. Rapdan Karamay XingLongTai Daqing 8 ASP Daqing, Commercial Gudao Gudong Gudong Shuanghe Wardlaw LaSalina Lagomar CantodoAmaro Carmopolis Sanand India ASP Buracica Catriel Oesta *Surtek s experience

7 Wyoming Oil Basins

8 Map

9 Map

10 Map

11 Map

12 Data Collation and Screening Contribute to EORI database construction for screening and scoping efforts Carry out screening using fuzzy-logic algorithms and heterogeneity indicators Cluster Wyoming reservoirs to find similarities and analogues Determine field candidates for laboratory studies

13 ASP Field Experiences: Gudong Field, China Daqing Field, China Karamay Field, China Xingbei Field, China Viraj Field, India Salina Field, Venezuela

14 ASP in Gudong Field, China (14 API) Pilot area consists of four I-5 Spot patterns with well spacing of 50m Including 4 injectors, 9 producers and 2 observation wells. Well pattern of the pilot area (SPE-39613)

15 ASP in Daqing Field, China (32 API) Pilot area consists of four I-5 Spot patterns with 4 injectors and 9 producers. Distance between producers and injectors is 200m and between producers 280m. Well Pattern of the ASP Flood at XII Area Daqing (SPE-49018)

16 ASP in Karamay Field, China (28 API) Pilot area consists of four I-5 Spot patterns with 4 injectors (I) and 9 producers (P). I-P distance is 50m and 70 m between producers. Karamay EZ District Pilot Test Area (SPE and 64726) A chemical formulation of this field study has been used for preliminary numerical simulation (Input Data available in UTCHEM)

17 ASP in Xingbei Field, China Large well spacing are due to low net pays 2 to 9 m (SPE-84896).

18 AP Field Experiences XinLong Tai Field, China David Pool, Canada

19 AP in XingLong Tai Field, China SPE-57291

20 AP in David Pool, Canada (22.6 API) Irregular patterns (7 injectors and 18 producers) in a 20 Acre spacing (SPE-89386).

21 Experimental Infrastructure Coreflooding system. Many parts ordered. Interfacial tension. Spinning drop available. Rheological fluid characterization. Rheometers specs under reviewed. Injection brine and effluent characterization. IC available on campus. Radial flooding system under consideration for later development. Saturation monitoring system under consideration.

22 ASP: Effect of Surfactant Conc. Example of spontaneous emulsification of a 24 API gravity crude oil and a commercial surfactant (synthetic petroleum sulfonate) solution dissolved in injection water after 60 days at reservoir temperature (60 C). Example of salting out effect (surfactant precipitation at concentrations higher than 1200 ppm) in the same crude oil with a different commercial surfactant and experimental conditions.

23 Coreflooding System (AP) Confining pressure By - pass Isco pump V 1 Pressure transducers Core Back-pressure regulator Isco pump Oil Transfer Vessels Brine N 2 or He Alkali-Polymer Alkali Two-phase separator or Sample collector Oven

24 Chemical Flooding: Injection Sequence 2PV Waterflood WF 0.3PV 0.4PV 0.5PV AP flood WF AP Pre-Flood WF PV 0.4PV 0.5PV ASP flood WF AP ASP Pre-Flood WF Flow Direction

25 Modeling and Simulation UTCHEM (University of Texas, Austin) STARS (Computer Modeling Group, CMG) Analytic S, P and SP simulation Chemical Equilibrium Calculations Molecular Dynamics

26 Modeling and Simulation