Preliminary design of a special casing joint for a well equipped twin horizontal drainholes in the Oxnard field

Technical Report · Fri Dec 31 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10140206· OSTI ID:10140206

The Oxnard field is presently under production,with a typical average monthly oil production of about 70,000 B, of which the Vaca Tar sand represents more than half.It is Unitized and operated under cyclic steam injection.The hot Tar and produced water are lifted to the surface with rod pumps equipped for injection of a diluent. The produced WOR is about 2.5 and the GOR is about 150 scf/B. The Vaca Tar sand originally contained about 400 million STB. The estimated recoverable reserve under full-scale cyclic steam injection is 100 to 120 Million STB. Under steamflood, it might reach 240 million STB. The objectives of this field test are: (1) increase well productivity by using a vertical well equipped with twin horizontal drainholes, each of about 1,000 ft. reach; (2) maximize the well draw-down by locating the horizontal wells near the base of the sand layer; (3) reduce capital cost by using twin drainholes connected to the same vertical cased well; (4) reduce operating expenses by eliminating the need for a service rig to pull-out the rods and pump before each steam injection cycle; and (5) be adaptable to other operating modes.

• Research Organization: Southern California Research Corp., San Rafael, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG49-93CE15600
• OSTI ID: 10140206
• Report Number(s): DOE/CE/15600--T1; ON: DE94009476; BR: EF7202 -0
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040401
BITUMENS
CAPITALIZED COST
DIRECTIONAL DRILLING
ENHANCED RECOVERY
FIELD TESTS
IN SITU METHODS
TRUE AND MODIFIED
OIL WELLS
OPERATING COST
PROGRESS REPORT
STEAM INJECTION
WELL CASINGS