Duties and Reports of the Subsurface Geologist 



821 



Paraguay 



(Country) 



Parana 



(Region) 



EXPLORATORY WELL SUMMARY 



ASCENCION NO. 1 



(Pacific Exploration Company) 



(Well) 



Date: Nov. 17, 1941 



Location: Ascencion structure, Santa Rosa department. Coord: 

 N. 176, 261 E. 163,644. (Origin: Cruz Nevada N. 200,000 E 

 200,000) . 



Elevation: 148.6' (DF) 139' (Gd). 



Spudded: Sept. 12, 1940 Depth: 12,680' T.D. (7-25-41). 



Operational Status (and Date): Suspended. (7-26-41). 



Structure: Faulted anticline. Objective: Braden sand. 



Casing 



Size 

 16" 



Shoe 

 638' 



10,454' 



Production Tests and Shows 



Tests Shovps 



Interval Test Rise Recovery 



7160-7250' JFT 2500' 20% oil; 60% mud. 7170-7268' Minor oil and gas shows. 

 8235-8425' JFT 5000' Muddy water. 8220-8460' Good oil and gas shows. 



Formation Interval Depth 



Final 

 Pleistocene 



Santa Maria 900' 0- 900' 



Miocene 



Rosa 1,150' 900- 2,050' 



Upper Dalmar 2,550' 2,050- 4,600' 



Lower Dalmar 1,945' 4,600- 6,545' 



Oligocene 



Concepcion 615' 6,545- 7,160' 



Eocene 



San Pablo 3,520' 7,160-10,680' 



(Upper Salina) :..( 58') ( 7,182- 7,240') 



(Lower Salina) ( 155') ( 7,600- 7,755') 



(Castro sand) ( 172') ( 8.243- 8,415') 



Rocha 869' 10,680-11,549' 



(Braden sand) ( 350') (10,680-11,030') 



Tentative 

 Paleocene 



Cesana 576' 11,549-12,125' 



Cretaceous 



Upper Winther 555' Penetrated 12,125-12,680' TD 



Estimated 

 Cretaceous 



Winther 860' 12,680-13,540' 



Taube limestone 13,540- 



By: HBM/dc Distribution: RML HFT NFE WRS AMP PCC LOR Well: Ascension 

 No. 1. 



Confidentiality — Particularly considering that this form summarizes much 

 of our most significant drilling data, confidential status of compiled forms per- 

 taining to company wells must be carefully preserved. At the same time, the 

 usefulness of the form will be measured by the extent to which these data may 

 be fully utilized by all company personnel properly concerned with this infor- 

 mation. Distribution must be correspondingly inclusive. 



