	attacks affect colombia s oil outlook ecopetrol continuous rebel raids against oil pipelines and foreign exploration camps endanger colombia s present oil bonanza franciso chona manager of the state run oil company ecopetrol said it seems the subversion wants to end with our oil bonanza he told reporters he was speaking after a meeting with defense minister rafael samudio military chiefs and mines and energy minister guillermo perry to review the security situation in the light of a recent upsurge of leftist guerrilla attacks in the oil rich arauca region bordering venezuela ecopetrol chief of security retired general carlos narvaez said security measures would be stricter and that the armed forces were closely collaborating but gave no details samudio said new plans had been designed and hoped they would be effective samudio stressed that despite the most recent attacks which cost more than four mln dlrs in damage the overall situation had improved compared with last december when initial measures were taken to combat a wave of attacks repeated bombings of a vital pipeline from the cano limon oilfield to the caribbean then led to a loss of barrels of  reuter 
